| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Blacktail Deer Creek | Beaverhead river | 45.2314000000 | -112.6340000000 | Map | |||||||
| Red Rock River (Montana) |  | Beaverhead river | 110,000 | 44.9425000000 | -112.8450000000 | Map | |||||
| Ruby River |  | Beaverhead river | 122,000 | 45.5202777778 | -112.3402777778 | Map |