Green River (Duwamish River tributary)

The Green River is a 65-mile (105 km) long river in the state of Washington in the United States.

Green River
Looking upriver from suspension bridge in Isaac Evans Park, Auburn, Washington
Map of the Duwamish/Green River watershed with the Green River highlighted
The mouth of the Duwamish River in Washington State Green River (Duwamish River tributary) (the United States)
Location
Country	United States
State	Washington
County	King
Cities	Auburn, Kent, Tukwila
Physical characteristics
Source	Cascade Range
- coordinates	47°8′N 121°18′W
- elevation	3,283 ft (1,001 m)
Mouth	Duwamish River
- coordinates	47°28′N 122°15′W
- elevation	57 ft (17 m)
Length	65 mi (105 km)
Basin size	440 sq mi (1,100 km2)
Discharge
- location	Auburn, Washington
- average	1,316 cu ft/s (37.3 m3/s)
- minimum	81 cu ft/s (2.3 m3/s)
- maximum	28,100 cu ft/s (800 m3/s)

It is where the serial killing was done by Gary Ridgway, the "Green River killer".

Today, much of the upper valley supplies water for Tacoma.