The Mad River (Wiyot: Baduwa't) is a river in upper Northern California. It flows for 113 miles (182 km) in a roughly northwest direction through Trinity County and then Humboldt County, draining a 497-square-mile (1,290 km2) watershed into the Pacific Ocean north of the city of Arcata near Arcata–Eureka Airport in McKinleyville. The river's headwaters are in the Coast Range near South Kelsey Ridge.

Quelle: Wikipedia