- Abalone Cove Ecological Reserve
- Abalone Cove Reserve
- Abalone Cove State Marine Conservation Area
- Abrams Open Space
- Acalanes Ridge
- Acalanes Ridge Open Space
- Adobe Falls Ecological Reserve
- Agua Amarga Reserve
- Agua Caliente County Park
- Agua Tibia Wilderness
- Airport Flats
- Al Johnson Wildlife Area
- Alabama Hills National Scenic Area
- Alameda Watershed
- Alamos Canyon Open Space
- Alcatraz Island
- Aliso and Wood Canyons Wilderness Park
- Alkali Meadow
- Almaden Quicksilver County Park
- Almond Ranch
- Alpine Butte Wildlife Sanctuary
- Alta Vicente Reserve
- Alta Vista Open Space
- Alto Bowl Open Space Preserve
- Anderson Boat Launch Entrance
- Anderson Island Natural Preserve
- Anderson Lake County Park
- Anderson Marsh Natural Preserve
- Anderson Ranch
- Andrea Wilson Triangle
- Andrew Molera State Park
- Andrews Meadows
- Angel Island State Park
- Angeles National Forest
- Año Nuevo State Marine Reserve
- Año Nuevo State Park
- Ansel Adams Wilderness
- Anthony Chabot Regional Park
- Antioch Dunes National Wildlife Refuge
- Antone Meadows Natural Preserve
- Antonelli Pond
- Anza-Borrego Desert State Park
- Anza-Borrego Desert State Wilderness
- Aramburu Island
- Arana Gulch
- Arcadia Wilderness Park
- Arcata Community Forest
- Arcata Community Forest - Sunny Brae Tract
- Arcata Marsh and Wildlife Sanctuary
- Arena Rock Marine Natural Preserve
- Argus Range Wilderness
- Armstrong Redwoods State Natural Reserve
- Arrow Point to Lion Head Point State Marine Conservation Area
- Arrowhead Ridge
- Arroyo Conejo Nature Preserve
- Arroyo Park
- Arroyo Seco Canyon
- Arroyo Sequit
- Arthur B. Ripley Desert Woodland State Park
- Ascot Hills Park
- Ash Creek State Wildlife Area
- Asilomar Dunes Natural Preserve
- Asilomar State Beach
- Asilomar State Marine Reserve
- Aspen Glen Reserve
- Atherton Avenue Bayland
- Auburn Ravine Nature Preserve
- Auburn State Recreation Area
- Auburn State Recreation Area
- Augustin Bernal Park
- Ava and Cole Weintraub Family Park
- Avawatz Mountains Wilderness
- Azalea State Natural Reserve
- Aztec Woods
- Bachman Open Space
- Bahia Wetlands
- Bahia Wildlife Habitat
- Bailey Canyon Wilderness Park
- Bair Island Ecological Reserve
- Baird Ranch Reserve
- Bald Hill Open Space Preserve
- Baldwin Hills Scenic Overlook
- Ballona Wetlands Ecological Reserve
- Ballona Wetlands Ecological Reserve
- Baltimore Canyon Open Space Preserve
- Barnett Ranch County Preserve
- Basking Ridge Conservation Easement
- Battle Creek Wildlife Area
- Beaconsfield Canyon
- Bear Canyon Wilderness Study Area
- Bear Creek Redwoods Open Space Preserve
- Bear Mountain Wilderness Study Area
- Beauty Mountain Wilderness
- Beauty Mountain Wilderness Study Area
- Bell Canyon Park
- Berryessa Snow Mountain National Monument
- Beverly Glen Park
- Big Bend
- Big Break Regional Shoreline
- Big Butte Wilderness Study Area
- Big Chico Creek Ecological Reserve
- Big Creek State Marine Conservation Area
- Big Creek State Marine Reserve
- Big Dalton Canyon Wilderness Park
- Big Flat State Marine Conservation Area
- Big Lagoon Forest, East Natural Preserve
- Big Lagoon Forest, South Natural Preserve
- Big Lagoon Forest, West Natural Preserve
- Big Maria Mountains Wilderness
- Big Morongo Canyon Preserve
- Big Rock Preserve
- Big Sandy State Wildlife Management Area
- Big Table Mountain Ecological Reserve
- Big Tujunga Wash Mitigation Area
- Bigelow Cholla Garden Wilderness
- Bighorn Mountain Wilderness
- Billy Mac Canyon
- Bird Sanctuary
- Biscar State Wildlife Area
- Bishop Ranch Regional Open Space Preserve
- Bitter Creek National Wildlife Refuge
- Bitterbrush Instant Study Area
- Black Diamond Mines Regional Preserve - Land Bank
- Black Mountain Open Space Park
- Black Mountain Wilderness
- Black Mountain Wilderness Study Area
- Black Swan Preserve
- Black Wall
- Blithedale Summit Open Space Preserve
- Blixseth Mountain Park
- BLM Open Space
- BLM Open Space
- Blue Cavern (Offshore) State Marine Conservation Area
- Blue Cavern (Onshore) State Marine Conservation Area
- Blue Heron Trails
- Blue Oak Ranch Reserve
- Blue Sky Ecological Reserve
- Bluff Lake Reserve
- Bodega Head State Marine Conservation Area
- Bodega Head State Marine Reserve
- Bodega Marine Reserve
- Bodfish Preserve
- Bodie Mountain Wilderness Study Area
- Bodie State Historic Park
- Bodie Wilderness Study Area
- Bolinas Lagoon Preserve
- Bolsa Chica Ecological Reserve
- Bommer Canyon Open Space Preserve
- Boney Mountain State Wilderness
- Bonny Doon Ecological Reserve
- Bonny Doon Ecological Reserve (closed to public)
- Border Field State Park
- Bosque del Rio Hondo Natural Area
- Bothe-Napa Valley State Park
- Box Springs Mountain Open Space (City)
- Box Springs Mountain Reserve
- Box Springs Reserve
- Boyd Deep Canyon Desert Research Center
- Boyd Memorial Park
- Bracut Tidelands Public Access
- Brand Park
- Brazil Ranch
- Briar Summit Open Space Preserve
- Bright Star Wilderness
- Bristol Mountains Wilderness
- Brown Ranch Mitigation Lands
- Brush Creek/Lagoon Lake Wetlands and Coastal Dunes Natural Preserve
- Brushy Peak Resource Protection Area
- Bryan Osborne Nature Center
- Buck Gully Reserve
- Bucknam Tract Conservation Easement
- Bucks Lake Wilderness
- Bull Creek State Wilderness
- Bureau of Land Management
- Burrowing Owl Preserve
- Burton Creek Natural Preserve
- Burton Creek State Park
- Burton Homestead Preserve
- Butano State Park
- Butte Valley Wildflower Sanctuary
- Buttermilk Country Wildlife Area
- Butters Canyon
- Byrne-Milliron Forest
- Byron Vernal Pools
- C. Fredrick Faudé Open Space Park
- Cabrillo National Monument
- Cabrillo State Marine Reserve
- Cache Creek Nature Preserve
- Cache Creek Wilderness
- Cadiz Dunes Wilderness
- Cady Mountains Wilderness Study Area
- Cahuilla Hills Park
- Cahuilla Mountain Wilderness
- Calabasas City Open Space
- Calabasas Open Space
- Calabasas Peak
- Calabasas Peak Open Space
- Calaveras Big Trees State Park
- Calaveras South Grove Natural Preserve
- Calaveras Watershed
- Caliente Mountain Wilderness Study Area
- California Citrus State Historic Park
- California Coastal National Monument
- Cambria State Marine Conservation Area
- Cameron Nature Preserve at Puerco Canyon
- Camino Alto Open Space Preserve
- Camino Corto Open Space
- Camp 8 (NPS land)
- Camp Cady Wildlife Area
- Campus Point State Marine Conservation Area
- Cañón de Lana Nature Preserve
- Cantara/Ney Springs Wildlife Area
- Canyon Springs
- Cap Homme / Ralph Adams Park
- Caplow Property
- Carbon Canyon Open Space
- Cardiff State Beach
- Caribou Wilderness
- Carl "A" Anderson Redwoods Natural Preserve
- Carl O Gerhardy Wildlife Sanctuary
- Carlsbad Highlands Ecological Reserve
- Carlsbad State Beach
- Carmel Bay State Marine Conservation Area
- Carmel Mountain Preserve
- Carmel Pinnacles State Marine Reserve
- Carmel River Bird Sanctuary
- Carmel River Lagoon and Wetland Natural Preserve
- Carmel River State Beach
- Carnadero Preserve
- Carpinteria Bluffs Nature Preserve
- Carpinteria Seal Sanctuary
- Carquinez Regional Shoreline
- Carr Ranch Preserve
- Carrington Point State Marine Reserve
- Carrizo Gorge Wilderness
- Carrizo Gorge Wilderness Study Area
- Carrizo Plain National Monument
- Carrizo Plains Ecological Reserve
- Carson-Iceberg Wilderness
- Carson-Iceberg Wilderness Study Area
- Cartago Wildlife Area
- Casa Del Caballero
- Casa Diablo Wilderness Study Area
- Casa Dorinda Oak Woodland
- Casa Loma Entrance
- Cascade Canyon Preserve
- Casino Point State Marine Conservation Area
- Caspar Headlands State Beach
- Caspar Headlands State Natural Reserve
- Caspar Headlands State Reserve
- Castaic Lake State Recreation Area
- Castle Canyon
- Castle Crags State Park
- Castle Crags Wilderness
- Castle Mountains National Monument
- Castle Rock National Wildlife Refuge
- Castle Rock Special Closure
- Castle Rock State Park
- Castro Crest
- Cat Harbor State Marine Conservation Area
- Cave Gulch/Wilder Natural Reserve
- Cayucos State Beach
- Cedar Roughs Wilderness
- Cerro San Luis Natural Reserve
- Cerro Villa Park
- César E. Chávez National Monument
- Chah-GAH-Cho
- Chalk Hill Nature Reserve
- Challenger Park
- Chanchelulla Wilderness
- Chaparral Hill
- Charmlee Wilderness Park
- Chateau Calabasas
- Chatsworth Nature Preserve
- Chatsworth Nature Preserve (unfenced)
- Chemehuevi Indian Tribe Designated Recreational Area
- Chemehuevi Mountains Wilderness
- Cherry Canyon Park
- Chesbro Reservoir Boat Launch Entrance
- Chesbro Reservoir County Park
- Chidago Canyon Wilderness Study Area
- Chimney Peak Wilderness
- China Camp State Park
- Chino Hills State Park
- Christopher Hill County Preserve
- Chuckwalla Mountains Wilderness
- Chuckwalla National Monument
- Chumash Park
- Chumash Wilderness
- Cienega Springs Ecological Reserve
- Cinder Flats State Wildlife Area
- Circle X Ranch
- Cisco Grove Gould Park
- City of Clayton Open Space
- City of Santa Cruz Open Space (closed areas)
- Clam Beach County Park
- Claremont Canyon
- Claremont Canyon Regional Preserve
- Claremont Hills Wilderness Park
- Clayton Ranch
- Clear Creek Serpentine Area of Critical Environmental Concern
- Clear Lake National Wildlife Refuge
- Clear Lake State Park
- Cleghorn Lakes Wilderness
- Cleveland National Forest
- Clipper Mountain Wilderness
- Clover Creek Preserve
- Coal Canyon Ecological Preserve
- Coal Creek Open Space Preserve
- Coal Creek Open Space Preserve (closed area)
- Coal Mine Ridge Preserve
- Coal Oil Point Reserve
- Coastal Prairie Conservation Easement Area
- Cold Creek Canyon Preserve
- Cold Creek Nature Preserve
- Cold Creek Valley Preserve
- Cold Creek West Preserve
- Coldwater Canyon Open Space
- Coldwater Canyon Park
- Colusa Bypass Wildlife Area
- Colusa National Wildlife Refuge
- Conejo Canyons Open Space
- Conejo Ridge Open Space
- Contra Costa Goldfields
- Coppins Meadow
- Coral Mountain Park
- Corbin Canyon Park
- Corral Canyon Park
- Corriganville Park
- Coso Range Wilderness
- Cotoni-Coast Dairies Unit, California Coastal National Monument
- Cottonwood Court Open Space
- Cove Oasis
- Cow Mountain Management Area
- Coyote Creek Parkway
- Coyote Creek Parkway
- Coyote Creek Preserve
- Coyote Hills Regional Park
- Coyote Lake - Harvey Bear Ranch County Park
- Coyote Lake Entrance
- Coyote Mountains Wilderness
- Coyote Ridge Open Space Preserve
- Coyote Ridge Silicon Valley Land Conservancy Preserve
- Coyote Valley Open Space Preserve
- Coyote Valley Open Space Preserve Entrance
- Crab Cove Marine Reserve
- Crater Mountain Wilderness Study Area
- Crocker Lake Open Space
- Crockett Hills Regional Park
- Crystal Cove State Marine Conservation Area
- Crystal Cove State Park
- Crystyl Ranch Open Space
- CSLC Open Space
- Cucamonga Wilderness
- Cuesta Ridge Botanical Special Interest Area
- Curry Canyon Ranch
- Curtis
- Cuyamaca Meadow Natural Preserve
- Cuyamaca Mountain State Wilderness
- Cuyamaca Rancho State Park
- Cypress Ridge Open Space
- Dal Molin-Runcie Nature Preserve
- Dales Lake Ecological Reserve
- Dana Point State Marine Conservation Area
- Dandelion Open Space
- Darwin Falls Wilderness
- David M. Brown Overlook
- Day Use Area
- Dayton Canyon Open Space
- Dead Mountains Wilderness
- Death Valley National Park
- Death Valley Wilderness
- Decker Canyon Camp
- Decker Island Wildlife Area
- Deer Canyon Park Preserve
- Deer Creek Area of Critical Environmental Concern
- Deer Creek Canyon Area
- Deer Creek Open Space
- Deer Island Preserve
- Deer Ridge Open Space
- Deer Valley
- Deervale-Stone Canyon Park
- Del Mar Landing State Marine Reserve
- Del Mar Mesa Ecological Reserve
- Del Mar Mesa Preserve
- Del Norte Coast Redwoods State Park
- Del Sol Vernal Pool Preserve
- Delevan National Wildlife Refuge
- Delhi Sand Fly Reserve
- Delta Access
- Delta Meadows
- Desert and Mountain Conservation Authority
- Desert Cahuilla/Freeman Project
- Desert Tortoise Habitat Area
- Desert Tortoise Natural Area
- Desert Tortoise Preserve
- Desert View Conservation Area
- Desolation Wilderness
- Deukmejian Wilderness Park
- Devil's Garden
- Devil's Garden Preserve
- Devils Postpile National Monument
- Diablo Foothills Regional Park
- Diamond X Ranch
- Dick Smith Wilderness
- Dictionary Hill County Preserve
- Digawututklh
- Dinkey Lakes Wilderness
- Dinwiddie Preserve
- Dixie Canyon Park
- Doane Valley Natural Preserve
- Doheny State Beach
- Dollar Property
- Domeland Wilderness
- Dominguez Nature Preserve
- Dominican Nature Preserve
- Doolan Canyon
- Dos Reis County Park
- Dos Rios State Park
- Dos Vientos Open Space
- Double Butte County Park
- Double Cone Rock State Marine Conservation Area
- Dougherty Hills Open Space
- Dow Wetlands Preserve
- Dry Canyon Creek Park
- Dry Creek
- Dry Creek Pioneer Regional Park
- Dry Creek Preserve
- Duarte Wilderness Preserve
- Dublin Hills Regional Park
- Dutch Slough
- East Coyote Ridge Reserve
- East Regional Pond Wildlife Area
- East Slope Natural Reserve
- East Walker Ranch Open Space
- Easton Point Open Space Preserve
- Eaton Canyon Natural Area and Nature Center
- Eaton Canyon Open Space
- Ecological Study Area
- Ed R. Levin County Park
- Ed Z'berg Sugar Pine Point State Park
- Eden Valley Wilderness Study Area
- Edgewood Park and Nature Preserve
- Edward F. Ricketts State Marine Conservation Area
- Edwin L. Z'berg Natural Preserve
- El Capitán State Beach
- El Corte de Madera Creek Open Space Preserve
- El Corte de Madera Creek Open Space Preserve (closed area)
- El Dorado Riparian Corridor
- El Escorpion Park
- El Moro Elfin Forest Preserve
- El Nido Open Space Lots
- El Paso Mountains Wilderness
- El Sereno Open Space Preserve
- El Sereno Open Space Preserve (Closed areas)
- El Toro Open Space
- El Toro Open Space Preserve
- Elizabethtown Meadows
- Elk River Wildlife Area
- Elk River Wildlife Sanctuary
- Elkhorn Ridge Wilderness
- Elkhorn Slough National Estuarine Research Reserve
- Ellicott Slough National Wildlife Refuge
- Elliott Nature Preserve
- Elsmere Canyon
- Elyria Canyon Park
- Elysian Park
- Emerald Bay State Park
- Emigrant Wilderness
- Encino Reservoir
- Enid Pearson-Arastradero Preserve
- Escalona Gulch
- Escondido Canyon Park
- Eureka Marsh
- Excelsior Wilderness Study Area
- Fairfield Osborn Preserve
- Farallon Islands National Wildlife Refuge
- Farallon Wilderness Area
- Farnsworth (Offshore) State Marine Conservation Area
- Farnsworth (Onshore) State Marine Conservation Area
- Fay Canyon Wildlife Area
- Fay Slough Wildlife Area
- Felton Station Open Space Preserve (closed)
- Filiorum Reserve
- Fillmore Nature Park
- Finnon Recreation Area
- Fireworks Hill Open Space
- Fish Creek Mountains Wilderness
- Fish Slough Ecological Reserve
- Fish Slough Wilderness Study Area
- Fish Traps Archeological Site
- Fisher Creek Conservation Easement
- Fitzgerald Marine Reserve
- Five Canyons Open Space
- Five Springs Wilderness Study Area
- Floriston Property
- Folsom Lake State Recreation Area
- Fond Family Open Space
- Fond Nature Preserve
- Foothills Nature Preserve
- Foothills Open Space Preserve
- Forks of Butte Creek Recreation Area
- Forrestal Reserve
- Fort Funston
- Fort Ord Dunes State Park
- Fort Ord National Monument
- Fort Ross State Historic Park
- Fossil Ridge Park
- Four Corners
- Fran Pavley Meadow
- Franklin Canyon Park
- Fred Wolff Bear Creek Nature Preserve
- Freeman Canyon Cultural Preserve
- Fremont Older Open Space Preserve
- Fremont Peak State Park
- Fremont Valley Ecological Reserve
- Fremont Weir Wildlife Area
- French Ranch Open Space Preserve
- Fritz & Alma Meier Natural Use Area
- Fryer Trust Bayland
- Fryman Canyon Park
- Funeral Mountains Wilderness
- G. George and Kathleen S. Fox Hiking Park
- Galindo Creek Field Station
- Galvin Ranch
- Garaventa Wetlands Preserve
- Garcia Mountain Wilderness Study Area
- Garcia Wilderness
- Gardena Willows Wetland Preserve
- Garin Regional Park
- Garin Regional Park Restricted Area
- Garland Ranch Regional Park
- Garrapata State Park
- Gary Giacomini Open Space Preserve
- Gates King Open Space
- Gateway
- Gaviota State Park
- George F Canyon Nature Preserve
- George J. Hatfield State Recreation Area
- George Wolfberg Park at Potrero Canyon
- Gerstle Cove State Marine Reserve
- Getty View Park
- Giant Sequoia National Monument
- Gird Valley Preserve
- Glen Deven Ranch
- Glenwood Open Space Preserve
- Glider Hill Open Space
- Golden Trout Wilderness
- Golden Valley Ranch Open Space
- Golden Valley Wilderness
- Goleta Slough Ecological Reserve
- Goodan Ranch Sycamore Canyon County Preserve
- Gooseflats Wildlife Area
- Gopher Canyon (Native Plant Restoration Area)
- Gorman Cultural Preserve
- Gould Canyon / Lukens Connection
- Gould Canyon Trail
- Granite Chief Wilderness
- Granite Mountain Wilderness
- Grant Park
- Grass Valley Wilderness
- Gray Lodge Wildlife Area
- Great Falls Basin Wilderness
- Great Valley Grasslands State Park
- Green Cove Seal Rookery
- Green Ranch
- Greenwood State Beach
- Greyhound Rock Fishing Access
- Greyhound Rock State Marine Conservation Area
- Griffith Park
- Grinnell Natural Area
- Griswold Hills Day use area
- Grizzly Creek Redwoods State Park
- Grizzly Island Wildlife Area- Crescent Unit
- Grizzly Island Wildlife Area- Garibaldi Unit
- Grizzly Island Wildlife Area- Golden Hills Unit
- Grizzly Island Wildlife Area- Goodyear Slough Unit
- Grizzly Island Wildlife Area- Grey Goose Unit
- Grizzly Island Wildlife Area- Grizzly Island Unit
- Grizzly Island Wildlife Area- Island Slough Unit
- Grizzly Island Wildlife Area- Joice Island Unit
- Grizzly Island Wildlife Area- West Family Unit
- Grizzly Peak Open Space
- Grover Hot Springs State Park
- Guadalupe-Nipomo Dunes National Wildlife Refuge
- Gualala Point Regional Park
- Gull Island State and Federal Marine Reserve
- Gull Park
- Hacienda Entrance
- Hagen Canyon Natural Preserve
- Hahamongna Watershed Natural Park
- Hain Wilderness
- Haines Canyon Park
- Half Moon Bay State Beach
- Hallelujah Junction Wildlife Area
- Halperin Open Space Preserve
- Hamilton Wetlands
- Hansen Dam Recreation Area
- Hanson Felton Quarry Preserve — West Perimeter Set-Aside Area
- Happy Camp Canyon Regional Park
- Harford Springs Reserve
- Harmon Canyon Preserve
- Harmony Headlands State Park
- Harper Dry Lake
- Harris Point State and Federal Marine Reserve
- Harry A Barbier Memorial Park
- Harry A. Merlo State Recreation Area
- Hartzell Park
- Harvey Bear Ranch Entrance
- Harvey Ranch Preserve
- Haskell Canyon Open Space
- Hauser Mountain Wilderness Study Area
- Hauser Wilderness
- Havasu National Wildlife Refuge
- Hawthorne Canyon Open Space Preserve
- Hayfork Reservoir
- Hayward Regional Shoreline
- Headwaters Corner
- Headwaters Forest Reserve
- Heath Property
- Heenan Lake Wildlife Area
- Heidelberg Park
- Heintz Open Space
- Hellhole Canyon Open Space Preserve
- Henderson Canyon Open Space
- Hendy Woods State Park
- Henness Pass
- Hennesy Property
- Henninger Flats
- Henrietta Basin
- Henry Ridge Open Space
- Henry W. Coe State Park
- Hepatic Gulch Open Space
- Hermon Park (Arroyo Seco Park)
- Herngt Aki Reserve
- Heron Rookery Natural Preserve
- Hicks/Wood Entrance
- Hidden Canyon Park
- Hidden Creeks Open Space
- Hidden Divide Natural Preserve
- Hidden Palms
- Hidden Valley Nature Center
- Hidden Valley Open Space
- Hidden Valley Wildlife Area
- Hidden Villa
- Highfield Greenbelt
- Highland Springs
- Hill Rd Entrance
- Hill Slough Wildlife Area
- Hillpark Open Space
- Hilton Open Space
- Hollow Hills Wilderness
- Holser Canyon Open Space
- Homer Ranch Preserve
- Honey Lake State Wildlife Area
- Honey Lake State Wildlife Area (Dakin Unit)
- Honey Lake State Wildlife Area (Flemming Unit)
- Hood Mountain - McCormick Ranch Addition
- Hood Mountain Regional Park and Preserve
- Hoover Wilderness
- Hope Nature Preserve
- Hope Valley Wildlife Area
- Hopper Mountain National Wildlife Refuge
- Horse Hill Open Space Preserve
- Horseshoe Ranch Wildlife Area
- Horsetown-Clear Creek Preserve
- Huckleberry Hill Nature Preserve
- Huddart County Park
- Humboldt Bay National Wildlife Refuge
- Humboldt Bay National Wildlife Refuge
- Humboldt Bay National Wildlife Refuge - Lanphere Dunes Unit
- Humboldt Bay National Wildlife Refuge - Ma-le'l Dunes Unit
- Humboldt Coastal Nature Center
- Humboldt Lagoons State Park
- Humboldt Redwoods State Park
- Hungry Valley Oak Woodland Natural Preserve
- Hungry Valley State Vehicular Recreation Area
- Ibex Wilderness
- Idyllwild Nature Center
- Imperial Sand Dunes Recreation Area
- Imperial Sand Dunes Recreation Area (Limited Use)
- Independence Creek Wilderness Study Area
- Indiam Palms
- Indian Joe Springs Ecological Reserve
- Indian Palms
- Indian Pass Wilderness
- Indian Springs Open Space
- Indio Hills Palms Park
- Inglenook Fen-Ten Mile Dunes Natural Preserve
- InterTribal Sinkyone Wilderness
- Inyo Mountains Wilderness
- Iodine Springs Reserve
- Isacson
- Ishi Wilderness
- Ishxenta State Park
- Jack and Laura Dangermond Preserve
- Jack Dunster Marine Biological Reserve
- Jack London State Historic Park
- Jackass Ridge Conservation Easement
- Jacumba National Cooperative Land and Wildlife Management Area
- Jacumba Wilderness Area
- James Dilley Greenbelt Preserve
- Jasper Ridge Biological Preserve
- Jedediah Smith Redwoods State Park
- Jenner Headlands Preserve
- Jennie Lakes Wilderness
- Jensen Ranch Historical Park
- Jepson Prarie Preserve
- Jessie Street Marsh
- Joel McCrea Ranch Park
- Joel McCrea Wildlife Refuge
- John B. Dewitt Redwoods State Natural Reserve
- John Krebs Wilderness
- John L. Carter Memorial Park
- John Little State Natural Reserve
- John Muir National Historic Site
- John Muir Wilderness
- Johnson Canyon
- Johnson Meadow
- Johnson Ranch
- Johnson Ranch Open Space
- Joseph D. Grant County Park
- Joshua Creek Canyon Ecological Reserve
- Joshua Tree National Park
- Joshua Tree Wilderness
- Juan Prado Mesa Preserve
- Judith Rock State Marine Reserve
- Jug Handle State Natural Reserve
- Julia Pfeiffer Burns State Park
- Jurupa Mountains Discovery Center
- Kaiser Wilderness
- Kaseberg Nature Preserve
- Kashtayit State Marine Conservation Area
- Kaslow Natural Preserve
- Kechaye Cultural Preserve
- Keilhofer
- Kelso Dunes Wilderness
- Kendall-Frost Mission Bay Marsh Reserve
- Kenneth Hahn State Recreation Area
- Kern National Wildlife Refuge
- Kern Wild and Scenic River
- Kiavah Wilderness
- King Clone Ecological Reserve
- King Gillette Ranch
- King Mountain Open Space Preserve
- King Range National Conservation Area
- King Range Wilderness
- Kings Canyon National Park
- Kingston Range Wilderness
- Kinneloa Irrigation District Open Space
- Kinsman Flat Wildlife Area
- Klamath National Forest
- Knoll Open Space
- Kruse Rhododendron State Natural Reserve
- La Brea Green Belt
- La Cañada Irrigation District Open Space
- LA City Open Space
- LA County Fire Open Space
- LA County Open Space
- LA County Open Space
- LA County Open Space
- LA County Open Space
- LA County Sanitation District Open Space
- La Honda Creek Open Space Preserve
- La Honda Creek Open Space Preserve (closed areas)
- La Honda Creek Open Space Preserve (permit area)
- La Jolla Open Space
- La Jolla Valley Natural Preserve
- La Selva Open Space
- La Sierra Canyon Wetlands
- La Sierra Preserve
- La Tuna Canyon Park
- Labisco Hill Open Space
- Lacey Meadow
- Lacks Creek Management Area
- LADWP Open Space
- LADWP Open Space
- Ladyface Agoura Open Space
- Ladyface Mountain Open Space
- Laguna Beach State Marine Conservation Area
- Laguna Beach State Marine Reserve
- Laguna Coast Wilderness Park
- Laguna Seca Conservation Area
- Laing-Brookfield Open Space
- Lake Calavera Preserve
- Lake Davis Wetlands and Coastal Dunes Natural Preserve
- Lake Eleanor Open Space
- Lake Hollywood Open Space
- Lake Ming County Park
- Lake of the Woods State Wildlife Area
- Lake of the Woods State Wildlife Area
- Lake Oroville State Recreation Area
- Lake Oroville State Recreational Area
- Lake Perris State Recreation Area
- Lake Silveira Wetlands
- Lake Sonoma
- Lakeside Ranch Reserve
- Land Bank
- Land Bank
- Land Bank
- Land Bank
- Land Bank
- Landels-Hill Big Creek Nature Reserve
- Lands End
- Lang Ranch - Montgomery Ranch Open Space
- Lang Ranch Open Space
- LaPoint Land Bank
- Las Flores Canyon Open Space
- Las Virgenes MWD Open Space
- Las Virgenes View Park
- Lassen Volcanic National Park
- Lassen Volcanic Wilderness
- Laurel Canyon Park
- Laurel Canyon Preserve
- Lava Beds National Monument
- Lava Beds Wilderness
- Lava Wilderness Study Area
- LAX El Segundo Dunes Preserve
- Least Tern Natural Preserve
- Least Tern Site
- Lema Ranch
- Leo A. Carrillo and Edith Carrillo Memorial Park
- Leo Carrillo State Park
- Lexington Reservoir County Park
- Lexington Reservoir County Park (closed area)
- Liberty Canyon Open Space
- Lick Observatory
- Lime Ridge Open Space
- Linden H. Chandler Preserve
- Linder Grove
- Little Black Mountain Preserve
- Little Chuckwalla Mountains Wilderness
- Little Picacho Wilderness
- Little River State Beach
- Little Uvas Open Space Preserve
- Live Oak Entrance
- Lodato Open Space Preserve
- Lokern Ecological Reserve
- Loma Alta Open Space Preserve
- Lone Tree Point
- Long Point State Marine Reserve
- Long Ridge Open Space Preserve
- Long Ridge Open Space Preserve (closed areas)
- Longridge Park
- Los Angeles County Flood Control District Open Space
- Los Angeles County Waterworks District No. 29 Open Space
- Los Banos Wildlife Area
- Los Flores Ranch Park
- Los Jilgueros Preserve
- Los Osos Oaks State Natural Reserve
- Los Padres National Forest
- Los Padres Open Space
- Los Peñasquitos Canyon Preserve
- Los Peñasquitos Marsh Natural Preserve
- Los Robles Open Space
- Los Trancos Open Space Preserve
- Los Vaqueros Reservoir and Watershed
- Lot 25
- Louis Rubidoux Nature Center
- Lover's Cove State Marine Conservation Area
- Lovers Point - Julia Platt State Marine Reserve
- Lower Arroyo Park
- Lower Cottonwood Creek Wildlife Area
- Lower Moore Creek Natural Reserve
- Lower Sherman Island Wildlife Area
- Lower Yuba River
- Lusardi Creek Preserve
- Lynnmere Open Space
- Ma-le'l Dunes South
- Machesna Mountain Wilderness
- Machesna Wilderness Study Area
- MacKerricher State Park
- Mad River Bluffs
- Mad River Slough Wildlife Area
- Madrona Marsh Nature Preserve
- Magic Mountain Wilderness
- Mahany Nature Reserve
- Mailliard Redwoods State Natural Reserve
- Malaga Reserve
- Malibu Bluffs Park
- Malibu Creek State Park
- Malibu Lagoon State Beach
- Malibu Nature Preserve
- Malibu Springs (NPS)
- Malpais Mesa Wilderness
- Manchester State Park
- Mandalay State Beach
- Mandeville Canyon Park
- Mangini Ranch Educational Preserve
- Manila Dunes Recreation Area
- Manly Peak Wilderness
- Manresa State Beach
- Marble Mountain Wilderness
- Marble Mountains Wildlife Area
- Mare Island Shoreline Heritage Preserve
- Marin Islands Ecological Reserve
- Marin Islands National Wildlife Refuge
- Marina Dunes Natural Preserve
- Marina State Beach
- Marine Stadium Reserve
- Marjorie Saunders Park
- Marple Canyon Open Space
- Marr Ranch Open Space
- Marsh Creek
- Marsh Creek 1
- Marsh Creek 2
- Marsh Creek 4
- Marsh Creek 5
- Marsh Creek 6
- Marsh Creek 7
- Marsh Creek State Park
- Martin Griffin Preserve
- Martin Luther King Jr. Regional Shoreline
- Martis Camp Conservation Easement
- Martis Creek Lake Recreation Area
- Marvin Braude Mulholland Gateway Park
- Marywood Preserve
- Matilija Wilderness
- Matlahuayl State Marine Reserve
- Mattole Canyon State Marine Reserve
- Maurice Thorner Memorial Open Space Preserve
- Máyyan 'Ooyákma – Coyote Ridge Open Space Preserve
- McAbee Entry
- McCarthy Blue Oak Ranch Preserve
- McConnell State Recreation Area
- McCrea Open Space
- McGrath State Beach
- McKay Community Forest
- McKinleyville Community Forest
- McLaughlin Eastshore State Park
- McNee Ranch State Park
- MCRA
- McReynolds Wildlife Sanctuary
- Meadowbrook Ecological Reserve
- Mecca Hills Wilderness
- Medea Creek Open Space
- Meins Landing
- Memorial County Park
- Memorial Ridge Open Space Preserve
- Mendocino Headlands State Park
- Mendoza Ranch Entrance
- Merced County Preserve
- Merced Grasslands
- Merced National Wildlife Refuge
- Merced River Wilderness Study Area
- Merced Vernal Pools and Grassland Reserve
- Mesquite Wilderness
- Michael D. Antonovich Open Space
- Michael D. Antonovich Regional Park at Joughin Ranch
- Mid-Coyote Valley Open Space Additions (Closed)
- Mike Thompson Wildlife Area
- Milagra Ridge
- Milk Ranch-Case Mountain Wilderness Study Area
- Mill Creek Redwood Preserve (closed)
- Millard Canyon Open Space
- Miller/Knox Regional Shoreline
- Miners Ravine Nature Reserve
- Minniear Day Use Area
- Miramar Mounds National Natural Landmark
- Miramontes Ridge Open Space Preserve
- Mission Canyon Open Space
- Mission Trails Regional Park
- Mitchell Caverns Natural Preserve
- Mitteldorf Preserve
- Moabi Regional Park
- Mockingbird Hill Entrance
- Modjeska Canyon and Tucker Wildlife Sanctuary
- Modoc National Wildlife Refuge
- Modoc Preserve
- Mojave Desert Land Trust
- Mojave Desert Land Trust
- Mojave Desert Land Trust
- Mojave National Preserve
- Mojave River Forks Regional Park
- Mojave Trails National Monument
- Mojave Wilderness
- Mokelumne Wilderness
- Monarch Butterfly Natural Preserve
- Monarch Eucalyptus Grove
- Monarch Wilderness
- Mono Lake Tufa State Natural Reserve
- Monrovia Canyon Park
- Monrovia Hillside Wilderness Preserve
- Monrovia Open Space
- Montaña de Oro State Park
- Montara State Marine Reserve
- Monte Bello Open Space Preserve
- Monte Rio Redwoods Regional Park and Open Space Preserve
- Monterey State Historic Park
- Montgomery Woods State Natural Reserve
- Moore Creek Upland Open Space Preserve
- Moore Creek Wetland Natural Preserve
- Moorhen Marsh
- Moorpark City Open Space
- Morgan Territory
- Morgan Territory Ranch
- Mori Point (GGNRA)
- Mormon Island Wetlands Natural Preserve
- Morro Bay National Estuary Program
- Morro Bay State Marine Recreational Management Area
- Morro Bay State Marine Reserve
- Morro Bay State Park
- Morro Dunes Natural Preserve
- Morro Rock Natural Preserve
- Morro Strand State Beach
- Moses Wilderness Study Area
- Moss Landing State Beach
- Motte Rimrock Reserve
- Mount Biedeman Wilderness Study Area
- Mount Burdell Open Space Preserve
- Mount Diablo Gateway
- Mount Lassic Wilderness
- Mount Madonna County Park
- Mount Madonna North Reserve
- Mount San Jacinto State Park
- Mount San Jacinto State Wilderness
- Mount Shasta Wilderness
- Mount Sutro Open Space Reserve
- Mount Tamalpais Watershed
- Mount Vernon Park
- Mountain Park
- Mountains Restoration Trust Land
- Mountains Restoration Trust Land
- Mountains Restoration Trust Land
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- MRCA Open Space
- Mt. SAC Wildlife Sanctuary
- Muir Beach (GGNRA)
- Muir Woods National Monument
- Mulholland Heights HOA Open Space
- Mulholland Open Space Preserve
- Murrelet State Wilderness
- Napa-Sonoma Marshes Wildlife Area
- Naples State Marine Conservation Area
- National Recreation Area
- Native Plant Preserve (Kite Hill)
- Natomas Station Wildlife Area
- Natural Bridges State Marine Reserve
- nature corridor
- Navarro River Redwoods State Park
- Neary Lagoon Wildlife Refuge
- Nelder Grove Historical Area
- New Brighton State Beach
- New Chicago Marsh
- Newberry Mountains Wilderness
- Newhall Pass Open Space
- Newhall Pass Trailhead
- Newt Habitat
- Nicholas Flat Natural Preserve
- Nike Missile Launch Site LA-88 (Closed)
- Nopah Range Wilderness
- Norris Rancho Marino Reserve
- North Algodones Dunes Wilderness
- North Campus Open Space
- North Coyote Valley Conservation Area
- North Etiwanda Preserve
- North Farallon Islands State Marine Reserve
- North Fork American Wild and Scenic River
- North Fork Wilderness
- North Grasslands Wildlife Area
- North Mesquite Mountains Wilderness
- North Peak Ranch
- North Ranch Open Space
- North Richmond Shoreline
- North Richmond Wetlands
- North Table Mountain Ecological Reserve
- Northern Wildlife Preserve
- Northstar Vail Conservation Easement
- Novato Lands 005
- NPS Land
- NPS Land
- NPS Land
- Nueva/Macadamia Open Space
- O'Melveny Park
- O'Neill Forebay Wildlife Area
- O'Neill Regional Park
- Oak Canyon Nature Center
- Oak Crest Open Space
- Oak Forest Canyon Natural Area
- Oak Forest West
- Oak Hill Lane
- Oak Park
- Oak Savannah Arboretum
- Oakbrook Regional Park
- Oakoasis Preserve
- Oakshire Canyon Open Space
- Ocean Trails Reserve
- Ocotillo Wells State Vehicular Recreation Area
- Ohlone Coastal Cultural Preserve
- Ohlone Regional Wilderness Area
- Ohlone Regional Wilderness Preserve
- Ohlone Tiger Beetle Management Area
- Ohlone Wilderness Trail Permit Area
- Ojai Meadows Preserve
- Ojai Saddle Trails
- Old Chatsworth Reservoir
- Old Conejo Open Space
- Old Greenwood
- Old Hilary's Botanical Preserve
- Old Meadows Open Space
- Old Ranch Open Space
- Old Sacramento State Historic Park
- Old Saint Hilary's Open Space Preserve
- Old Woman Mountains Wilderness
- Olympia Watershed
- Olympic Blvd. Staging Area
- Olympic Meadow Preserve
- Open space
- Orinda Oaks Park
- Orocopia Mountains Wilderness
- Oroville Wildlife Management Area
- Otay Mountain Wilderness
- Otis R. Johnson Wilderness Park
- Owens Peak Wilderness
- Owens Peak Wilderness Study Area
- Owens River Headwaters Wilderness
- Owl's Nest Open Space
- Pa-nu Cultural Preserve
- Pace Family Wilderness Park
- Pacheco Marsh
- Pacheco State Park
- Pacific Grove Marine Gardens State Marine Conservation Area
- Pahrump Valley Wilderness
- Painted Cave State Marine Conservation Area
- Painted Rock
- Pajaro River Ag Preserve (South)
- Pajaro River Mouth Natural Preserve
- Palassou Ridge Preserve
- Palen-McCoy Wilderness
- Palo Comado and Cheeseboro Canyons
- Palo Corona Regional Park
- Palo Verde Mountains Wilderness
- Palomar Mountain State Park
- Panoche Hills
- Panoche Hills North Wilderness Study Area
- Panoche Hills South Wilderness Study Area
- Panoche/Coalinga Area of Critical Environmental Concern
- Parkway Trust / Caglia
- Parma Open Space
- Pedro Point Headlands
- Pelanconi Park
- Pepperdine University Open Space
- Pescadero Creek County Park
- Pescadero Marsh Natural Preserve
- Pescadero Ranch Reserve
- Petaluma Adobe State Historic Park
- Petaluma Marsh Expansion Site
- Petaluma River Marsh Wildlife Area
- Peter Strauss Ranch
- Peters Canyon Regional Park
- Peytonia Slough Ecological Reserve
- Pfeiffer Big Sur State Park
- Phillip Burton Wilderness
- Phleger Estate (GGNRA)
- Picacho Peak Wilderness
- Picacho State Recreational Area
- Picchetti Ranch Open Space Preserve
- Piedras Blancas Light Station Outstanding Natural Area
- Piedras Blancas State Marine Conservation Area
- Piedras Blancas State Marine Reserve
- Pigeon Point County Park
- Pillar Point Bluff
- Pillar Point State Marine Conservation Area
- Pilson Property
- Pine Creek Wilderness
- Pineforest
- Pinnacles National Park
- Pinole Valley Watershed
- Pinto Mountains Wilderness
- Pío Pico State Historic Park
- Piper Lane Presere
- Piper Mountain Wilderness
- Pismo Dunes Natural Preserve
- Pismo State Beach
- Pit River Canyon Wilderness Study Area
- Piuma Ridge Park
- Piute Cypress Instant Study Area
- Piute Mountains Wilderness
- Pixley National Wildlife Refuge
- Placer County Open Space
- Placerita Canyon State Park
- Pleasant View Ridge Wilderness
- Pleasanton Ridge Regional Park
- Pleasanton Ridge Regional Park Restricted Area
- Pogonip Open Space Preserve
- Point Buchon State Marine Conservation Area
- Point Buchon State Marine Reserve
- Point Conception State Marine Reserve
- Point Dume State Beach & Preserve
- Point Dume State Marine Conservation Area
- Point Dume State Marine Reserve
- Point Edith Wildlife Area
- Point Isabel Regional Shoreline
- Point Lobos State Marine Conservation Area
- Point Lobos State Marine Reserve
- Point Lobos State Natural Reserve
- Point Mugu State Park
- Point Reyes National Seashore
- Point St. George Reef Offshore State Marine Conservation Area
- Point Sur Dunes Natural Preserve
- Point Vicente State Marine Conservation Area
- Pole Mountain Preserve
- Polygon Open Space
- Poppy Nature Area
- Portuguese Bend Reserve
- Portuguese Ledge State Marine Conservation Area
- Potrero Reserve
- Potrero Ridge Open Space
- Prairie Creek Redwoods State Park
- Prescott Preserve
- Prime Desert Woodland Preserve
- Private Open Space Preserve
- Proctor Valley Natural Resource Area
- Providence Mountains State Recreation Area
- Puente Hills Preserve
- Puente Hills Preserve
- Puente Hills Preserve
- Pulgas Ridge Open Space Preserve
- Purisima Creek Redwoods Open Space Preserve
- Purisima Creek Redwoods Open Space Preserve (closed area)
- Pushwalla Palms
- Pushwalla Palms
- Putah Creek State Wildlife Area
- Quail Hill Open Space Preserve
- Quail Hollow Ecological Reserve
- Quail Hollow Quarry Conservation Areas
- Quail Run Open Space
- Quarry Park
- Quigley Canyon Open Space
- Rainbow Basin/Owl Canyon Area of Critical Environmental Concern
- Ramirez Canyon Park
- Ramona Grasslands Preserve
- Rancho Cañada
- Rancho Cañada de los Osos Ecological Reserve
- Rancho Cañada del Oro Open Space Preserve Entrance
- Rancho Corral de Tierra
- Rancho Potrero Open Space
- Rancho San Antonio County Park
- Rancho San Antonio Open Space Preserve
- Rancho San Vicente Entrance
- Rancho Sierra Vista/Satwiwa
- Rancho Simi RPD Open Space
- Rancho Simi RPD Open Space
- Rancho Simi RPD Open Space
- Rancho Ventura
- Randall Morgan Sandhills
- Randall Preserve
- Rasmussen Open Space
- Rattlesnake Canyon
- Ravenswood Open Space Preserve
- Red Buttes Wilderness
- Red Cliffs Natural Preserve
- Red Hill Open Space Preserve
- Red Hill Open Space Preserve - Leased
- Red Hills
- Red Rock Canyon Park
- Redwood Creek Beach County Park
- Redwood Grove Nature Preserve
- Redwood Heritage State Wilderness
- Redwood National and State Parks
- Redwood National Park
- Refugio State Beach
- Reinhardt Redwood Regional Park
- Reservoir Canyon Natural Reserve
- Resting Spring Range Wilderness
- Rice Valley Wilderness Area
- Richardson Bay Audubon Center & Sanctuary
- Richardson Bay Audubon Sanctuary
- Richardson Grove State Park
- Richardson Rock State and Federal Marine Reserve
- Rideau
- Ridgeline Preserve
- Ridgeview Open Space
- Ring Mountain Open Space Preserve
- Rio de Los Angeles State Park
- Rip Van Winkle Open Space
- Rivas Canyon Park
- Rivendale Park and Open Space
- River Wilderness Park
- Riverside Mountains Wilderness
- Robert E. Ward Nature Preserve
- Robert J. Bernard Biological Field Station
- Robert Yoshio Nagata Park
- Robie Park
- Rock Hill Unit
- Rock Ridge Open Space
- Rocketdyne Santa Susana Field Lab
- Rockhouse A Wilderness Study Area
- Rocks and Islands Wilderness
- Rocky Creek-Cache Creek Wilderness Study Area
- Rocky Ledge
- Rocky Oaks
- Rodeo Grounds
- Rodman Arboretum
- Rodman Mountains Wilderness
- Ron Bishop & Judge Anderson Park
- Ronald W. Caspers Wilderness Park
- Roscoe-Valley Circle Park
- Rose Canyon Open Space
- Rose Hill Park
- Roseville Reserve
- Rosie the Riveter/World War II Home Front National Historical Park
- Round Mountain Conservation Easement
- Round Valley Regional Preserve
- Rowen Tree Open Space
- Roy's Redwoods Open Space Preserve
- Royal Gorge
- Rubio Canyon
- Runyon Canyon Park
- Rush Creek Open Space Preserve
- Rush Ranch
- Russell Research Station
- Russian Ridge Open Space Preserve
- Russian Ridge Open Space Preserve (closed area)
- Russian River State Marine Conservation Area
- Russian River State Marine Receational Management Area
- Russian Wilderness
- Rustic Canyon Park
- Sacatar Meadows Wilderness Study Area
- Sacatar Trail Wilderness
- Sacramento National Wildlife Refuge
- Sacramento River Bend (BLM)
- Sacramento River Wildlife Area
- Saddle Peak
- Saddle Peak Hills Wilderness
- Saddleback Butte State Park
- Sage Ranch Park
- Saint Cyrils Roman Catholic Church
- Salinas River Dunes Natural Preserve
- Salinas River Mouth Natural Preserve
- Salinas River National Wildlife Refuge
- Salinas River State Beach
- Saline Valley Ecological Reserve
- Salt Point State Park
- Salton Sea State Recreation Area
- Samuel P. Taylor State Park
- San Antonio Watershed
- San Benito Wilderness Study Area
- San Bernardino National Forest
- San Bruno Mountain State and County Park
- San Diego Bay National Wildlife Refuge
- San Diego National Wildlife Refuge
- San Diego River
- San Diego-La Jolla Underwater Park
- San Diego-La Jolla Underwater Park Ecological Reserve
- San Diego-La Jolla Underwater Park Marine Life Refuge
- San Diego-Scripps State Marine Conservation Area
- San Elijo Lagoon Ecological Preserve
- San Emigdio Plantation
- San Felipe Hills Wilderness Study Area
- San Felipe Ranch's The Nature Conservatory's Conservation Easement
- San Francisco Maritime National Historical Park
- San Francisco Peninsula Watershed
- San Francisco State Fish and Game Refuge
- San Gabriel Mountains National Monument
- San Gabriel Wilderness
- San Gorgonio Wilderness
- San Jacinto / Lake Perris Core Reserve
- San Jacinto / Lake Perris Core Reserve
- San Jacinto Wilderness
- San Joaquin Experimental Range
- San Joaquin Marsh Reserve
- San Joaquin River National Wildlife Refuge
- San Leandro Watershed
- San Lorenzo Headwaters Natural Preserve
- San Lorenzo River Open Space
- San Luis National Wildlife Refuge
- San Luis Reservoir State Recreation Area
- San Luis Reservoir Wildlife Area
- San Marcos Foothills Preserve
- San Mateo Canyon Wilderness
- San Onofre State Beach
- San Pablo Bay National Wildlife Refuge
- San Pablo Bay Regional Shoreline
- San Pablo Bay Wildlife Area
- San Pedro Ave Entrance
- San Pedro Mountain Open Space Preserve
- San Rafael Hills Open Space
- San Rafael Open Space
- San Rafael Wilderness
- San Ramon Reserve
- San Simeon Natural Preserve
- San Timoteo Canyon
- San Timoteo Nature Sanctuary
- San Venetia Marsh Open Space Preserve
- San Vicente Redwoods
- San Ysidro Mountain Wilderness Study Area
- Sanborn County Park
- Sand to Snow National Monument
- Sanhedrin Wilderness
- Santa Ana River Wildlife Area
- Santa Anita Habitat Mitigation Project
- Santa Clara Estuary Natural Preserve
- Santa Clara Valley Open Space Authority (Closed)
- Santa Clarita City Open Space
- Santa Clarita City Open Space
- Santa Clarita Woodlands Park
- Santa Cruz Long-Toed Salamander Ecological Reserve
- Santa Cruz Mission State Historic Park
- Santa Cruz Sandhills Community
- Santa Lucia Wilderness
- Santa Margarita Ecological Reserve
- Santa Margarita Island Open Space Preserve
- Santa Monica Mountains National Recreation Area
- Santa Rosa and San Jacinto Mountains National Monument
- Santa Rosa Creek Natural Preserve
- Santa Rosa Mountains State Wilderness
- Santa Rosa Openspace
- Santa Rosa Plateau Ecological Reserve
- Santa Rosa Wilderness
- Santa Teresa County Park
- Santa Ynez Canyon Park
- Santa Ysabel Preserve
- Sapwi Trails Community Park
- Saratoga Gap Open Space Preserve
- Sawmill Pebble Plain
- Sawtooth Mountains A Wilderness Study Area
- Sawtooth Mountains C Wilderness Study Area
- Sawtooth Mountains Wilderness
- Schwartz Property
- Scodie Wilderness Study Area
- Scorpion State and Federal Marine Reserve
- Scotts Flat Lake
- Scripps Coastal Reserve
- Sea Lion Gulch State Marine Reserve
- Seal Beach National Wildlife Refuge
- Seascape Uplands Preserve
- Secret Canyon Open Space
- Secret Valley
- Seep Zone Natural Reserve
- Sentinel Nature Preserve (WAN)
- Sepulveda Pass Open Space
- Sepulveda Wildlife Reserve
- Sequoia National Park
- Sequoia-Kings Canyon Wilderness
- Sequoya Challenge Preserve
- Serrania Park
- Sespe Condor Sanctuary
- Sespe Wilderness
- Seven Springs Natural Reserve
- SFB Morse Botanical Reserve
- Shady Canyon Open Space Preserve
- Shasta State Historic Park
- Shasta Valley Wildlife Area
- Sheep Mountain Wilderness
- Sheep Ridge Wilderness Study Area
- Sheephole Valley Wilderness
- Sheila Agnes Nature Preserve
- Shell Ridge Open Space
- Sierra Madre Historical Wilderness Area
- Sierra Valley Preserve
- Sierra Vista Open Space Preserve
- Siesta Valley
- Silver Peak Wilderness
- Silver Strand Natural Preserve
- Silver Strand State Beach
- Silverado Ridge Preserve
- Silverwood Lake State Recreation Area
- Sinkyone State Wilderness
- Sinkyone Wilderness State Park
- Siskiyou Wilderness
- Sisquoc Condor Sanctuary
- Sisson Meadow
- Skedaddle Wilderness Study Area
- Skunk Point State Marine Reserve
- Sky Oaks Reserve
- Sky Ridge
- Skyline Open Space
- Skyline Ridge Open Space Preserve
- Skyline Ridge Open Space Preserve (closed area)
- Slinkard Wilderness Study Area
- Slinkard/Little Antelope Wildlife Area
- Smith River National Recreation Area
- Smithe Redwoods State Natural Reserve
- SMMC Open Space
- SMMC Open Space
- SMMC Open Space
- SMMC Open Space
- Snow Mountain Wilderness
- Snowy Plover Enclosure
- Snowy Plover Roost
- Soda Mountains Wilderness
- Soda Springs Reserve
- Solstice Canyon
- Sonny Bono Salton Sea NWR Unit 1
- Soquel Canyon State Marine Conservation Area
- Soquel Lions Park
- Sorich Ranch Park Open Space Preserve
- South Cape Mendocino State Marine Reserve
- South Carlsbad State Beach
- South Fork Eel River Wilderness
- South Fork San Jacinto Wilderness
- South Hills Wilderness Area
- South La Jolla State Marine Conservation Area
- South La Jolla State Marine Reserve
- South Nopah Range Wilderness
- South Point State and Federal Marine Reserve
- South Ranch Open Space
- South Richmond Shoreline
- South Sierra Wilderness
- South Warner Contiguous Wilderness Study Area
- South Warner Wilderness
- South Yuba River State Park
- Southampton Bay Wetland Natural Preserve
- Southeast Farallon Island State Marine Conservation Area
- Southeast Farallon Island State Marine Reserve
- Southern Inyo Wilderness Study Area
- Southridge Village Open Space Reserve
- Southshore Hills Open Space
- Southwest Seal Rock Special Closure
- Spencer Lake Open Space
- Spenceville Wildlife Area
- Spineflower Habitat Protection Zone
- Springtown Wetlands Preserve
- SSFL North Buffer
- SSFL South Buffer
- St. Joseph's Hill Open Space Preserve
- Standish-Hickey State Recreation Area
- Stateline Wilderness
- Steamboat Rock Special Closure
- Stebbins Cold Canyon Reserve
- Stenner Springs Open Space
- Stepladder Mountains Wilderness
- Steve Thompson North Central Valley Wildlife Management Area
- Stevens Canyon Ranch
- Stevens Creek County Park
- Stevens Creek Shoreline Nature Study Area Open Space Preserve
- Stinson Beach (GGNRA)
- Stone Canyon Reservoir & Watershed
- Stone Lakes National Wildlife Refuge
- Stough Landfill Park
- Strawberry Hill Open Space
- Stuart Creek Run
- Stunt Ranch Santa Monica Mountains Reserve
- Sue-meg State Park
- Sugarloaf Island Special Closure
- Sugarloaf Open Space
- Sugarloaf Ridge State Park
- Sullivan Canyon Park
- Summit House Open Space
- Summit Valley Edmund D. Edelman Park
- Sunol Regional Wilderness
- Sunrise Meadows Open Space
- Sunset Cliffs Natural Park
- Sunset Hills Open Space
- Sunset Wetland Natural Preserve
- Surprise Canyon Wilderness
- Sutter Buttes State Park
- Swami's State Marine Conservation Area
- Sweet Springs Nature Preserve
- Sycamore Canyon Park
- Sycamore Canyon Wilderness Park
- Sycamore Valley Open Space Regional Preserve
- Sylvan Meadows Multi-Use Area
- Sylvania Mountains Wilderness
- Symmes Creek Wilderness Study Area
- Table Mountain Wilderness Study Area
- Tapia Canyon Open Space
- Tapia Park
- Tarantula Hill Open Space
- Tarplant Hill
- Tatavium Cultural Preserve
- Taylor Mountain Regional Park and Open Space Preserve
- Tc’ih-Léh-Dûñ
- Teague Hill Open Space Preserve
- Tecopa Ecological Reserve
- Tehama Wildlife Area
- Temescal Gateway Park
- Tern Nesting
- Terra Linda - Sleepy Hollow Open Space Preserve
- Texas Canyon Open Space
- Thatcher Ridge Wilderness Study Area
- The Big Brush
- The California Sea Otter State Game Refuge
- The Cedars
- The Cobb Estate
- The Forest of Nisene Marks State Park
- The Nature Conservancy Land
- The Nature Preserve
- The Triangle
- Theodore J. Hoover Natural Preserve
- Theodore Payne Wildlife Sanctuary
- Thomas F. Riley Wilderness Park
- Thornewood Open Space Preserve
- Thornewood Open Space Preserve (closed area)
- Thornton State Beach
- Thousand Lakes Wilderness
- Three Groves
- Three Sisters Reserve
- Thurgood Marshall Regional Park
- Tiburon Ridge Open Space Preserve
- Tiburon Uplands Nature Preserve
- Tijuana River Mouth State Marine Conservation Area
- Tijuana River National Estuarine Research Reserve
- Tijuana Slough National Wildlife Refuge
- Tilton Ranch Reserve
- Timbered Crater Wilderness Study Area
- Toad Hollow
- Tobin Clark Open Space
- Tolowa Dunes State Park
- Tom & Giselle Hennesy Nature Preserve
- Tomales Bay (GGNRA)
- Tomales Bay Ecological Reserve
- Top of Topanga Overlook
- Topanga State Park
- Torrey Pines State Natural Reserve
- Towle Conservation Easement
- Toyon Group Area Entrance
- Traylor Ranch Nature Reserve
- Trebek Open Space
- Tres Hermanos Ranch
- Trestles Wetlands Natural Preserve
- Trilobite Wilderness
- Trinidad State Beach
- Trinity Alps Wilderness
- Triunfo Canyon Open Space
- Triunfo Creek Park
- Truckee River Wildlife Area
- Truckee River Wildlife Area Canyon Unit
- Truckee River Wildlife Area Gray Creek Canyon Unit
- Truckee River Wildlife Area Union Ice Unit
- TSRA Marine Preserve
- Tujunga Ponds Wildlife Sanctuary
- Tulare Hill Conservation Area
- Tulare Hill Ecological Preserve
- Tule Elk Reserve State Park
- Tule Lake National Monument
- Tule Lake National Wildlife Refuge
- Tule Mountain Wilderness Study Area
- Tuna Canyon Park
- Tunitas Creek Open Space Preserve (closed)
- Tunnison Mountain Wilderness Study Area
- Turlock Lake State Recreation Area
- Turtle Bay Bird Sanctuary
- Turtle Mountains Wilderness
- Twin Lakes State Beach
- UC James San Jacinto Montain Reserve
- Udell Gorge Natural Preserve
- Ulistac Natural Area
- Upper Arroyo Seco
- Upper Arroyo Seco
- Upper Bidwell Park
- Upper Butte Basin Wildlife Area
- Upper Cottonwood Creek Wildlife Area
- Upper Hawthorne Canyon Open Space Preserve
- Upper Las Virgenes Open Space Preserve
- Upper Moore Creek Natural Reserve
- Upper Ramirez Canyon
- Upper Stevens Creek County Park
- Upper Toyon Ridge Nature Preserve (WAN)
- Upper Uvas Creek Open Space Preserve
- Uvas Canyon County Park
- Uvas South Reserve
- Vallecito Open Space
- Valley Hi Oak Park
- Valley View Preserve
- Van Damme Pygmy Forest Natural Preserve
- Van Damme State Park
- Van Sickle Bi-State Park
- Vandenberg State Marine Reserve
- Vargas Plateau Regional Park
- Vasco Hills
- Vasona Lake Eucalyptus Grove
- Veeh Creek Open Space
- Ventana Wilderness
- Ventu Park Open Space
- Ventura River Preserve
- Verdugo Mountain Park
- Verdugo Mountains Open Space Preserve
- Verdugo Mountains Park Property
- Vicente Bluffs Reserve
- Viera-North Peak
- Violin Canyon Open Space
- Vista Del Mar Open Space
- Vista del Norte Reserve
- Vizcaino Rock Special Closure
- Volcanic Tablelands Wilderness Study Area
- Volta State Wildlife Area
- Volta Wildlife Area
- Voorhis Ecological Reserve
- Waddle Ranch Preserve
- Wall Open Space Preserve
- Walnut Open Space
- Walteria Lake
- Ward Creek
- Washoe Meadows State Park
- Water Canyon Natural Preserve
- Waterdog Lake Open Space
- Wattles Garden Park
- Weaverville Joss House State Historic Park
- Webber Lake
- Wesley Reserve
- West End San Rafael Open Space
- West Hills Farm
- West Marshall Field Natural Reserve
- West Waddell Creek State Wilderness
- West Walker River Wildlife Area
- Westlake Village SMMC Open Space
- Westlake Vista Open Space
- Westridge-Canyonback Wilderness Park
- Whipple Mountains Wilderness
- Whiskeytown-Shasta-Trinity National Recreation Area - Shasta Unit
- Whiskeytown-Shasta-Trinity National Recreation Area - Trinity Unit
- Whiskeytown-Shasta-Trinity National Recreation Area - Whiskeytown Unit
- Whisky Snowmobile Area
- White Hill Open Space Preserve
- White Mountains Wilderness
- White Point Nature Preserve
- White Rock State Marine Conservation Area
- Whitecap ForeDunes Protected Area
- Whitewater Cove Riparian Corridor
- Whitewater Preserve
- Whiting Ranch Wilderness Park
- Whitney Canyon Park
- Wilacre Park
- Wild Walnut Park
- Wildcat Canyon Regional Park
- Wilder Beach Natural Preserve
- Wilder Dairy Cultural Preserve
- Wilderness Conservation Foundation
- Wildwood Canyon Open Space
- Wildwood Canyon Park
- Wildwood Canyon State Park
- Wildwood Park
- Will Rogers State Historic Park
- William R. Mason Regional Park (wilderness area)
- Willoughby Preserve
- Willson Ranch
- Wilson Canyon Park
- Wind Wolves Preserve
- Windy Hill Open Space Preserve
- Windy Hill Open Space Preserve (closed areas)
- Winery Canyon Open Space
- Wintercreek
- Wistful Vista Open Space
- Wood Ranch Open Space
- Woodbridge Ecological Preserve - North Unit
- Woodbridge Ecological Preserve - South Unit
- Woodlands Special Treatment Area
- Woodridge Open Space
- Woodridge Open Space
- Worcester Park
- Wright Canyon
- Wunderlich County Park
- Yolla Bolly Contiguous Wilderness Study Area
- Yolla Bolly-Middle Eel Wilderness
- Yolo Bypass Wildlife Area
- Yosemite National Park
- Yosemite Wilderness
- Young Canyon
- Yuki Wilderness
- Zev Yaroslavsky Las Virgenes Highlands Park
- Zmudowski State Beach
- Zuma and Trancas Canyons
- Zuniga Ridge Open Space