Mad River (Washington)

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Mad River
Mad River (Washington) is located in Washington (state)
Mad River (Washington)
Location of the mouth of the Mad River in Washington
Mad River (Washington) is located in the United States
Mad River (Washington)
Mad River (Washington) (the United States)
CountryUnited States
Physical characteristics
SourceCascade Range
 ⁃ coordinates47°56′30″N 120°38′52″W / 47.94167°N 120.64778°W / 47.94167; -120.64778[1]
MouthEntiat River
 ⁃ coordinates
47°44′9″N 120°21′48″W / 47.73583°N 120.36333°W / 47.73583; -120.36333Coordinates: 47°44′9″N 120°21′48″W / 47.73583°N 120.36333°W / 47.73583; -120.36333[1]
Basin size92.4 sq mi (239 km2)[2]
 ⁃ locationriver mile 0.4 at Ardenvoir[2]
 ⁃ average76.7 cu ft/s (2.17 m3/s)[2]
 ⁃ minimum9.0 cu ft/s (0.25 m3/s)
 ⁃ maximum659 cu ft/s (18.7 m3/s)

The Mad River is a river in the U.S. state of Washington. It rises in the Cascade Mountains and flows southeast to join the Entiat River, it is part of the Columbia River basin, being a tributary of the Entiat River, which empties into the Columbia River.

See also[edit]


  1. ^ a b U.S. Geological Survey Geographic Names Information System: Mad River
  2. ^ a b c "Water Resources Data-Washington Water Year 2005; Entiat, Wenatchee, and Sand Hollow River Basins and the Columbia River from Wells Dam to Rock Island Dam" (PDF). USGS. Retrieved 31 July 2009.