Satsop River

Satsop River
Location of the mouth of the Satsop River in Washington
Location
Country	United States
State	Washington
County	Grays Harbor
Physical characteristics
Source	Confluence of East and West Forks
• coordinates	47°2′11″N 123°31′38″W / 47.03639°N 123.52722°W / 47.03639; -123.52722[1]
Mouth	Chehalis River
• coordinates	46°58′44″N 123°28′53″W / 46.97889°N 123.48139°W / 46.97889; -123.48139[1]
• elevation	23 ft (7.0 m)[1]
Length	6.5 mi (10.5 km)[2]
Basin size	291 sq mi (750 km2)[3]
Discharge
• location	river mile 2.3 near Satsop, WA[4]
• average	2,039 cu ft/s (57.7 m3/s)[4]
• minimum	147 cu ft/s (4.2 m3/s)
• maximum	51,800 cu ft/s (1,470 m3/s)

The Satsop River is a stream in the U.S. state of Washington. It has three main tributary forks, the East Fork, West Fork, and Middle Fork Satsop Rivers. The main stem Satsop River is formed by the confluence of the West and East Forks. The Middle Fork is a tributary of the East Fork. The three forks are much longer than the main stem Satsop itself, which flows south from the confluence only a few miles to join the Chehalis River near Satsop, Washington. Other significant tributaries include the Canyon River and Little River, both tributaries of the West Fork Satsop, and Decker Creek, a tributary of the East Fork Satsop River. The Satsop River's major tributaries originate in the Olympic Mountains and its southern foothills, the Satsop Hills, within Grays Harbor and Mason counties. Most of the Satsop River's watershed consists of heavily wooded hill lands. The upper tributaries extend into Olympic National Forest, approaching but not quite reaching Olympic National Park.

The Satsop River watershed is located east of the Wynoochee River and south of the Skokomish River watersheds.