Green River River Looking upriver from suspension bridge in Isaac Evans Park, Auburn, Washington Country United States State Washington County King Cities Auburn, Kent, Tukwila Source Cascade Range - elevation 3,283 ft (1,001 m) - coordinates 47 ° 8 ′ N 121 ° 18 ′ W ﻿ / ﻿ 47.133 ° N 121.300 ° W ﻿ / 47.133; - 121.300 Mouth Duwamish River - elevation 57 ft (17 m) - coordinates 47 ° 28 ′ N 122 ° 15 ′ W ﻿ / ﻿ 47.467 ° N 122.250 ° W ﻿ / 47.467; - 122.250 Coordinates: 47 ° 28 ′ N 122 ° 15 ′ W ﻿ / ﻿ 47.467 ° N 122.250 ° W ﻿ / 47.467; - 122.250 Length 65 mi (105 km) Basin 440 sq mi (1,140 km) Discharge for Auburn, Washington - average 1,316 cu ft / s (37 m / s) - max 28,100 cu ft / s (796 m / s) - min 81 cu ft / s (2 m / s) Map of the Duwamish / Green River watershed with the Green River highlighted
where does the green river in washington start and end
Cascade Range Duwamish River