Clayton · Contra Costa County · CA
Diabolical is a 1.0-mile trail near Clayton, in Contra Costa County, CA. It climbs 163 ft and descends 1,735 ft, between 1,894 ft and a high point of 3,466 ft. The surface is dirt. Mapped for hiking, trail running.
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Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Open the interactive map for routing, weather, and offline use.