Green River (North Fork Toutle River tributary)
| Green River | |
|---|---|
| Location | |
| Country | United States |
| State | Washington |
| Counties | Lewis, Skamania, Cowlitz |
| Physical characteristics | |
| Source | Near Spirit Lake |
| • location | Gifford Pinchot National Forest, Lewis County |
| • coordinates | 46°18′02″N 122°05′33″W / 46.30056°N 122.09250°W |
| • elevation | 4,765 ft (1,452 m) |
| Mouth | North Fork Toutle River |
• location | Toutle, Cowlitz County |
• coordinates | 46°22′22″N 122°34′57″W / 46.37278°N 122.58250°W |
• elevation | 741 ft (226 m) |
| Length | 37.4 mi (60.2 km) |
| Basin size | 131 sq mi (340 km2) |
| Discharge | |
| • location | near Kid Valley |
| • average | 479 cu ft/s (13.6 m3/s) |
| • minimum | 34.2 cu ft/s (0.97 m3/s) |
| • maximum | 14,500 cu ft/s (410 m3/s) |
The Green River is the largest tributary of the North Fork Toutle River in the U.S. state of Washington. Situated near Mount St. Helens in the Cascade Range in the southern part of the state, it flows generally west through Mount St. Helens National Volcanic Monument and industrial timberlands for 37.4 miles (60.2 km). The river drains more than 130 square miles (340 km2) in parts of three Washington counties: Skamania, Lewis, and Cowlitz.
As with most other parts of the Toutle River and Cowlitz River systems, the upper part of the Green River was heavily affected by the 1980 eruption of Mount St. Helens.