Texas Geography: Major Rivers, Lakes & Mountain Ranges
Texas' vastness (268,596 mi²) encompasses diverse hydrography and topography. Here are the principal features:
🌊 Major Rivers (Longest / Most Significant)
| River | Length (mi) | Key Facts |
|---|
| Rio Grande | 1,896 | Border with Mexico; 4th longest in US; Big Bend, Amistad, Falcon reservoirs |
| Brazos | 1,280 | Longest entirely in TX; flows to Gulf; Possum Kingdom, Whitney, Granbury lakes |
| Colorado (TX) | 862 | Not the AZ one; Austin, Bastrop, Matagorda Bay; Highland Lakes chain |
| Pecos | 926 | Rio Grande tributary; West TX; Red Bluff Reservoir |
| Canadian | 906 | Panhandle; Lake Meredith; Arkansas River basin |
| Red River | 1,360 | TX–OK border; Lake Texoma (Denison Dam) |
| Sabine | 510 | TX–LA border; Toledo Bend Reservoir (largest in South) |
| Trinity | 710 | Dallas/FW metro; Lake Livingston; flows to Galveston Bay |
| Guadalupe | 230 | Hill Country; Canyon Lake; Kerrville, New Braunfels, Victoria |
| San Antonio | 240 | San Antonio River Walk; Medina Lake; flows to Guadalupe |
🏞️ Major Reservoirs / Lakes (by Capacity)
| Lake | River | Capacity (acre-ft) | Primary Use |
|---|
| Toledo Bend | Sabine | 4.4M | Hydro, recreation, water supply |
| Sam Rayburn | Angelina | 3.9M | Flood control, hydro, recreation |
| Lake Texoma | Red | 2.6M | Flood, hydro, recreation (striper fishing) |
| Lake Livingston | Trinity | 1.7M | Houston water supply |
| Amistad | Rio Grande | 3.3M | Binational (US/MX), hydro, recreation |
| Falcon | Rio Grande | 2.6M | Binational, irrigation, recreation |
| Richland-Chambers | Trinity | 1.1M | Tarrant Regional Water District |
| Lake Travis | Colorado | 1.1M | LCRA, Austin water, recreation |
| Lake Buchanan | Colorado | 0.9M | Hydro, water supply |
| Cedar Creek | Trinity | 0.7M | Tarrant water supply |
⛰️ Mountain Ranges (All in Trans-Pecos / West Texas)
| Range | Highest Peak | Elevation (ft) | Notable Features |
|---|
| Guadalupe Mountains | Guadalupe Peak | 8,751 | TX high point; Permian reef fossil; McKittrick Canyon |
| Davis Mountains | Mount Livermore | 8,382 | McDonald Observatory; Sky Island ecology |
| Chisos Mountains | Emory Peak | 7,825 | Only range fully in a national park (Big Bend) |
| Franklin Mountains | North Franklin | 7,192 | Urban wilderness (El Paso); state park |
| Apache Mountains | Apache Peak | 6,600 | Remote; Culberson County |
| Sierra Diablo | Sierra Diablo | 6,610 | Wildlife management area |
| Hueco Mountains | Cerro Alto | 5,000 | Hueco Tanks (rock art, climbing) |
| Quitman Mountains | Quitman Peak | 6,600 | Hudspeth County |
| Glass Mountains | Glass Mountain | 5,800 | Brewster County; volcanic, not glass |
| Organ Mountains | Organ Needle | 8,990 | Mostly NM; southern tip in TX |
Texas water flows southeast to the Gulf; mountains rise only in the far west—islands of sky in a sea of plains.
Wanderlust World