- Acton Nature Center
- Alabama Creek Wildlife Management Area
- Alazan Bayou Wildlife Management Area
- Albert & Bessie Kronkosky State Natural Area
- Alibates Flint Quarries National Monument
- Alpine Road Site
- Amistad National Recreation Area
- Anahuac National Wildlife Refuge
- Anahuac National Wildlife Refuge
- Anahuac National Wildlife Refuge South Unit
- Angelina National Forest
- Anthem Tract
- Aquilla WMA
- Aransas National Wildlife Refuge
- Aransas National Wildlife Refuge - Myrtle Foster Whitmire Management Unit
- Arbor Hills Nature Preserve
- Armand Bayou Nature Center
- Atkinson Island Wildlife Management Area
- Attwater Prairie Chicken National Wildlife Refuge
- Baker Sanctuary
- Balcones Canyonlands National Wildlife Refuge
- Balcones Canyonlands Preserve - Snowden Tract
- Bannister Wildlife Management Area
- Barrow Nature Preserve
- Barton Creek Habitat Preserve
- Barton Creek Wilderness Park
- Baytown Nature Center
- Bear Creek Management Unit
- Beck Preserve
- Big Boggy National Wildlife Refuge
- Big Creek Scenic Area
- Big Lake Bottom WMA
- Big Spring Preserve
- Big Thicket National Preserve
- Big Thicket National Preserve - Loblolly Unit
- Big Walnut Creek Nature Preserve
- Bird Island
- Bird of Prey
- Black Gap Wildlife Management Area
- Blair Woods Sanctuary
- Blanco Shoals Natural Area
- Blunn Creek Nature Preserve
- Bob Jones Nature Center
- Bolivar Flats Shorebird Sanctuary
- Bowles Ranch
- Bracken Cave Preserve
- Brays Greenway Park
- Brazoria National Wildlife Refuge
- Brodie and Oakdale Properties
- Brodie Wild
- Buffalo Lake National Wildlife Refuge
- Bull Creek Management Unit
- Caddo Creek Unit
- Caddo Lake National Wildlife Refuge
- Caddo Lake Wildlife Management Area
- Canadian River Historic Wagon Bridge Nature Reserve
- Candy Abshier Wildlife Management Area
- Carrington's Prairie
- Castner Range National Monument
- Cattail Marsh
- Cave Without a Name
- Cedar Creek
- Cedar Ridge Preserve
- Chaparral Wildlife Management Area
- Charlie Wakeem/Richard Teschner Nature Preserve of Resler Canyon
- City Lake Park
- Coastal Prairie
- Colorado River Park Wildlife Sanctuary
- Cooks Slough Nature Park
- Corrie Herring Hooks Bird Sanctuary
- Cross Bar Special Recreation Management Area
- Crystal Canyon Nature Reserve
- Cy-Fair Nature Trails
- D.R. Wintermann Wildlife Management Area
- Davey Dogwood Park
- Decker Tallgrass Prairie Preserve
- Deer Park at Maple Run Preserve
- Dogwood Canyon Audubon Center
- Dos Vacas Muertas Bird Sanctuary
- Eagle Mountain Lake Park
- East End Lagoon Nature Perserve
- Eckert James River Bat Cave Preserve
- Edinburg Scenic Wetlands and World Birding Center
- Elephant Mountain Wildlife Management Area
- Eubanks Woods Bird Sanctuary
- Farnsworth Park
- Feather Lake Wildlife Refuge
- Fish Creek Forest Preserve
- Flagstone Creek Estates HOA Nature Trail
- Francine Cohn Preserve
- Frontera Audubon
- Gambill Wildlife Refuge
- Garver Greenspace
- Gene Howe Wildlife Management Area
- Gene Howe Wildlife Management Area - W. A. (Pat) Murphy Unit
- George Mitchell Nature Preserve
- Georgetown Lake Recreational Area
- Glen Rose Bird Sanctuary
- Goat Cave Karst Nature Preserve
- Government Canyon State Natural Area
- Granger Wildlife Management Area
- Great Trinity Forest Gateway and Horse Trail
- Guadalupe Mountains National Park
- Guadalupe Mountains Wilderness
- Gus Engeling WMA
- Gus Engeling WRDA
- Hagerman National Wildlife Refuge
- Heard Natural Science Museum & Wildlife Sanctuary
- Heart of the Hills Fisheries Science Center
- Herman Brown Park Nature Preserve
- Hill Country State Natural Area
- Hogg Bird Sanctuary
- Hogge Parkland Preserve
- Holland Cemetery Hunting Area
- Hornsby Bend Ecological Research Area
- Horseshoe Bend Wildlife Management Area
- Horseshoe Marsh Bird Sanctuary
- I-20 Wildlife Preserve and Jenna Welch Nature Study Center
- I.D. Fairchild State Forest
- Independence Creek Preserve
- Indian Grass Prarie Preserve
- Indiangrass Wildlife Sanctuary
- Iron Bridge Wildlife Management Area
- J.D. Murphree Wildlife Management Area
- Jackson Nature Park
- James C. Curry Nature Center
- James E. Daughtrey Wildlife Management Area
- Jocelyn Nungaray National Wildlife Refuge
- Joppa Preserve
- Justin Hurst Wildlife Management Area - North Stringfellow Pasture
- Kachina Prairie Park
- Keechie Creek
- Kerr Wildlife Management Area
- Knapp Land Conservation Easement
- Lafitte's Cove Nature Preserve
- Laguna Atascosa National Wildlife Refuge
- Lake Houston Wilderness Park
- Lakeview Assembly
- Las Palmas Bird Sanctuary
- Las Palomas Wildlife Management Area - Adams Unit
- Las Palomas Wildlife Management Area - Anacua Unit
- Las Palomas Wildlife Management Area - Arroyo Colorado Unit
- Las Palomas Wildlife Management Area - Brasil Unit
- Las Palomas Wildlife Management Area - Carricitos Unit
- Las Palomas Wildlife Management Area - Champion Unit
- Las Palomas Wildlife Management Area - Deshazo
- Las Palomas Wildlife Management Area - Ebony Unit
- Las Palomas Wildlife Management Area - Frederick Unit
- Las Palomas Wildlife Management Area - Longoria Unit
- Las Palomas Wildlife Management Area - McManus Unit
- Las Palomas Wildlife Management Area - Penitas Unit
- Las Palomas Wildlife Management Area - Tucker Unit
- Las Palomas Wildlife Management Area - Voshell Unit
- Lewisville Lake Environmental Learning Area
- Little Bear Creek Management Unit
- Little Sandy National Wildlife Refuge
- Long Meadow Farms Nature Preserve
- Lost Dog Nature Preserve
- Lost Maples State Natural Area
- Lost Oasis Cave Preserve
- Louis B Smith Boy Scout Woods Bird Sanctuary
- Lower Barton Creek Management Unit
- Lower Neches Wildlife Area Old River Unit
- Lower Neches Wildlife Management Area Nelda Stark Unit
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge
- Lower Rio Grande Valley National Wildlife Refuge (East Lake)
- Lower Rio Grande Valley National Wildlife Refuge (La Sal del Rey)
- Lower Rio Grande Valley National Wildlife Refuge (Teniente)
- Lubbock Lake National Historic Landmark
- Lyndon B. Johnson National Historical Park
- M. O. Neasloney Wildlife Management Area
- Mad Island Wildlife Management Area
- Mary Edna Crawford Bird Sanctuary
- Mary Gay Maxwell Management Unit
- Mason Mountain Wildlife Management Area
- Matador Wildlife Management Area
- Matagorda County Birding Nature Center
- Matagorda Island National Wildlife Refuge
- McAllen Nature Center
- McCommas Bluff Preserve
- McFaddin National Wildlife Refuge
- Meadow View Nature Area
- Meadows Center for Water and the Environment
- Medallion Park
- Medina River Natural Area
- Menoo Woods
- Meridian State Park
- Mineola Nature Preserve on the Sabine River
- Mission San Juan Capistrano
- Mitchell Lake Audubon Center
- Moore Plantation Wildlife Management Area
- Moore Plantation WMA
- Muleshoe National Wildlife Refuge
- Muse Wildlife Management Area
- Nalle Bunny Run Wildlife Preserve
- Nannie M. Stringfellow Wildlife Viewing Area
- Native Coastal Prairie Preserve
- North Open Reserve
- North Toledo Bend Wildlife Management Area
- Nueces Delta Preserve
- Old Sabine Bottom Wildlife Management Area
- Onion Creek Management Unit
- Onion Creek Wildlife Sanctuary
- Owl Creek Wildlife Management Area
- Padre Island National Seashore
- Palo Alto Battlefield National Historical Park
- Pawnee Inlet Unit
- Pecan Grove Wildlife Area
- Pelican Island Sanctuary
- Pineywoods Native Plant Center
- Playa Lakes Wildlife Management Area - Armstrong Unit
- Playa Lakes Wildlife Management Area - Dimmitt Unit
- Playa Lakes Wildlife Management Area - Taylor Unit
- Pogue Springs Preserve
- Pollywog Pond Bird & Wildlife Sanctuary
- Port Aransas Nature Preserve
- Possum Kingdom Fish Hatchery
- Purgatory Creek Greenspace
- Rancho Diana Park
- Red Bluff Nature Preserve
- Reimers Natural Parkland Preserve
- Richland Creek Wildlife Management Area
- Ringtail Ridge Natural Area
- Rita Blanca National Grassland
- Riverbend Nature Preserve
- Rob and Bessie Welder Wildlife Foundation
- Russell Creek Preserve
- S E Gast Red Bay Sanctuary
- Sabal Palm Sanctuary
- Sabine Woods Sanctuary
- San Antonio Missions National Historical Park
- San Gabriel Wildlife Area
- San Marcos Aquatic Resources Center
- Sandia Wetlands
- Santa Ana National Wildlife Refuge
- Scenic Canyon
- Schulle Canyon Natural Area
- Shady Hollow West Nature Preserve
- Shamrock Island Preserve
- Sheldon Park Nature Preserve
- Sheri Capehart Nature Preserve
- Shudde Fath Tract
- Sibley Nature Center
- Sierra Diablo Wildlife Management Area
- Smith Oaks Bird Sanctuary
- Sore Finger Wildlife Area
- South Hills Conservation Area
- South Laredo Nature and Birding Center
- South Llano River State Park
- South Open Reserve
- South Texas Ecotourism Center
- Southern Walnut Creek Greenbelt
- Spring Lake Preserve
- Stephenson Nature Preserve And Outdoor Education Center
- Stephenville Club Lake Nature Preserve
- Steven Bennett Park
- Stillhouse Hollow Nature Preserve
- Sunset Valley Nature Area
- Taub Greenspace
- Terry Hershey Park
- Texas Freshwater Fisheries Center
- Texas Point National Wildlife Refuge
- The City of Corpus Christi Wildlife Sanctuary
- The Leon River Medicine Wheel
- Thrive Nature Park
- Thunder Canyon Conservation Easement
- Timberlake Biological Field Station
- Tony Houseman/Blue Elbow Swamp Wildlife Management Area
- Trinity River - Mountain Creek Preserve
- Trinity River Audubon Center
- Trinity River Green Belt - Goat Island Preserve
- Trinity River Island Recreation Area
- Trinity River National Wildlife Refuge
- Trinity River National Wildlife Refuge - Boars Den Area
- Trinity River National Wildlife Refuge - Butler Unit
- Trinity River National Wildlife Refuge - Champion Lake Area
- Trinity River National Wildlife Refuge - Hirsch Unit
- Trinity River National Wildlife Refuge - McGuire Tract
- Trinity River National Wildlife Refuge - Silver Lake Unit
- Trinity River National Wildlife Refuge Brierwood Area
- Trinity River National Wildlife Refuge Page Unit
- Turk Ranch
- Turkey Hill Wilderness
- Twin Springs Preserve
- Uplands
- Upper Barton Creek Management Unit
- UT Southwestern Medical Center Rookery
- Village of Western Oaks Karst Preserve and Watershed Management Area
- Vivian J. Malone Preserve
- Waco Mammoth National Monument
- Waste Management Wildlife Park
- Watson Rare Native Plant Reserve
- Westgate and Sunset Properties
- Westside Preserve
- Whirlpool Cave
- White Flint Wildlife Management Area
- White Oak Creek Wildlife Management Area
- Wild Basin Wilderness Preserve
- Wildflower Preserve
- William H. Russell Karst Preserve
- Willis Creek Wildlife Area
- Wolf Creek Lake Park
- Woodson's Gully Nature Preserve
- Wortham Island Reserve
- Yoakum Dunes Wildlife Management Area