Marin County · CA
Bill Williams Trail Fire Road is a 0.6-mile easy (green) trail, in Marin County, CA. It climbs 246 ft and descends 207 ft, between 180 ft and a high point of 231 ft. Mapped for other.
All Marin County trailsCA trails
Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Updated 2026-07-21. Open the interactive map for routing, weather, and offline use.