| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Collawash River |  | 388,498,208 | Clackamas river | 19,000 | 45.0311000000 | -122.0610000000 | Map | ||||
| North Fork Clackamas River | 121,729,440 | Clackamas river | 18,000 | 45.2322000000 | -122.2540000000 | Map | |||||
| Oak Grove Fork Clackamas River | 321,158,528 | Clackamas river | 34,000 | 45.0744000000 | -122.0520000000 | Map | |||||
| South Fork Clackamas River |  | 71,483,672 | Clackamas river | 13,000 | 45.1989000000 | -122.2240000000 | Map | ||||
| Roaring River (Clackamas River tributary) | 113,959,472 | Clackamas river | 22,000 | 45.1580555600 | -122.1172222200 | Map |