Black River (Chehalis River tributary)
| Black River | |
|---|---|
Wetland near Black River, 2023 | |
Interactive map of River location | |
| Etymology | Color of waters |
| Location | |
| Country | United States |
| State | Washington |
| County | Thurston County |
| Physical characteristics | |
| Mouth | |
• coordinates | 46°49′16″N 123°13′10″W / 46.82111°N 123.21944°W |
| Length | 25 mi (40 km) |
| Basin size | 144 mi2 (370 km2) |
| Basin features | |
| Progression | Black River→ Chehalis River→ Pacific Ocean |
| GNIS feature ID | 1511608 |
The Black River is a river in Thurston County in the U.S. state of Washington. It is approximately 25 miles (40 km) long with a drainage basin of about 144 square miles (370 km2).