Hells Canyon of Boulder River Montana
| Class | IV+ to V |
| Current Flow |
2120.0 CFS 05-11-2025 09:00 
View River Forecast |
| Recommended Flow |
Minimum: Average: Maximum: |
| Typical Season |
Begins: January Ends: January |
| Recommended Use |
Kayaking: Yes Rafting: No Canoeing: No SUP: No Packrafting: No Fishing: No |
| Primary Gauge | Boulder River at Big Timber MT |
| Length | Mile(s) |
| Gradient | FPM |
