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.

Mad River
Location of the mouth of the Mad River in Washington Show map of Washington (state) Mad River (Washington) (the United States) Show map of the United States
Location
Country	United States
State	Washington
County	Chelan
Physical characteristics
Source	Cascade Range
• coordinates	47°56′30″N 120°38′52″W[1]
Mouth	Entiat River
• coordinates	47°44′9″N 120°21′48″W[1]
Basin size	92.4 sq mi (239 km2)[2]
Discharge
• location	river mile 0.4 at Ardenvoir[2]
• average	76.7 cu ft/s (2.17 m3/s)[2]
• minimum	9.0 cu ft/s (0.25 m3/s)
• maximum	659 cu ft/s (18.7 m3/s)

See also

• List of rivers of Washington
• List of tributaries of the Columbia River

References

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