| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cispus River |  | Cowlitz River | 87,000 | 46.4764000000 | -122.0940000000 | Map | |||||
| Ohanapecosh River |  | 177,414,176 | Cowlitz River | 26,000 | 46.6778000000 | -121.5840000000 | Map | ||||
| Tilton River | 398,858,144 | Cowlitz River | 47,000 | 46.5525000000 | -122.5340000000 | Map | |||||
| Toutle River |  | 4,017,600,000 | Cowlitz River | 170,000 | 46.3108000000 | -122.9180000000 | Map |