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Cowlitz River
| States | Washington |
| Length | 127.0 miles |
| Watershed Length* | 595 miles |
| Mouth | Columbia River ⤏ Eastern Pacific Ocean |
| GNIS | 1518230 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Butter Creek | 121 | 12 | 12 |
| Cispus River | 84 | 42 | 86 |
| Coweeman River | 2 | 37 | 37 |
| Cowlitz River - Clear Fork | 127 | 18 | 18 |
| Cowlitz River - Muddy Fork | 124 | 14 | 14 |
| Johnson Creek | 116 | 14 | 14 |
| Lacamas Creek | 28 | 22 | 22 |
| Ohanapecosh River | 127 | 16 | 16 |
| Olequa Creek | 25 | 19 | 34 |
| Salmon Creek | 33 | 32 | 47 |
| Tilton River | 58 | 31 | 31 |
| Toutle River | 20 | 17 | 123 |
| Winson Creek | 54 | 16 | 16 |
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey