| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| San Antonio River |  | 2,419,000,064 | 215 | Guadalupe River | 390,000 | 28.5072000000 | -96.8911000000 | Map | |||
| San Marcos River |  | 1,351,973,760 | Guadalupe River | 121,000 | |||||||
| Comal River |  | 336,698,432 | Guadalupe River | 4,000 | 29.7078000000 | -98.1234000000 | Map | ||||
| Cottonwood Creek (Guadalupe County) | Guadalupe River | 29.5269444444 | -97.9366666667 | Map | |||||||
| Geronimo Creek |  | Guadalupe River | 29.5414000000 | -97.9144000000 | Map |