Mad River may refer to:
Places Canada Mad River (British Columbia), a river of British Columbia Mad River (Ontario), a river of Ontario
United States Mad River (California) Mad River, California, a community in Trinity County, California Mad River (Connecticut), a river in New Haven County, Connecticut Mad River (Cold River), a tributary of the Cold River in Maine Mad River (Massachusetts), a river of Massachusetts Mad River (Cocheco River), a tributary of the Cocheco River in New Hampshire Mad River (Pemigewasset River), a tributary of the Pemigewasset River in New Hampshire Mad River (Ohio) Mad River Road, an overland route in Ohio Mad River (Vermont) Mad River Glen, a ski area in Vermont Mad River (Washington)
Other uses Mad River (band), a rock band based in San Francisco, California during the 1960s Mad River (novel), a western novel by Donald Hamilton Mad River Brewing Company, a brewing company in California Mad River Local School District, in Riverside, Ohio, United States
See also Erythropotamos, a river in Bulgaria and Greece known in Bulgarian as Luda reka ("Mad River") Mad River Township (disambiguation)