Siletz River
| Class | I |
| State | Oregon |
| Drainage | Siletz |
| Region | North Coast |
| Season | Nov-Apr |
| Length | 10 mi |
| Gradient | 10 ft/mi |
| Elevation Loss | 100 ft |
| Optimal Flow | 600 CFS |
| High Flow | 2,000 CFS |
| Low Flow | 400 CFS |
| Okay Flow | 400 CFS – 2,000 CFS |
| Class | I |
| State | Oregon |
| Drainage | Siletz |
| Region | North Coast |
| Season | Nov-Apr |
| Length | 10 mi |
| Gradient | 10 ft/mi |
| Elevation Loss | 100 ft |
| Optimal Flow | 600 CFS |
| High Flow | 2,000 CFS |
| Low Flow | 400 CFS |
| Okay Flow | 400 CFS – 2,000 CFS |