Mad River · Humboldt County · CA
Happy Jack Trail is a 1.0-mile hard trail near Mad River, in Humboldt County, CA. It climbs 375 ft and descends 803 ft, between 2,450 ft and a high point of 3,157 ft. Hard difficulty: calculated from 23% avg grade · 2.0 mi round trip, 1,210 ft climb. Mapped for hiking, trail running, mountain biking, equestrian, ohv.
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Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Open the interactive map for routing, weather, and offline use.