| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Beaverhead River |  | 12,374,962,176 | Jefferson River | 111,045 | 45.5678000000 | -112.3390000000 | Map | ||||
| Big Hole River |  | Jefferson River | 246,000 | 45.5614000000 | -112.3410000000 | Map | |||||
| Boulder River (southwestern Montana) | Jefferson River | 124,000 | 45.8669000000 | -111.9460000000 | Map |