St. Marys · Elk County · PA
Thunder Mountain - Billings Hollow is a 0.8-mile moderate trail near St. Marys, in Elk County, PA. It climbs 10 ft and descends 439 ft, between 1,168 ft and a high point of 1,596 ft. Moderate difficulty: calculated from 10% avg grade · 1.7 mi round trip, 450 ft climb. Mapped for equestrian.
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Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Open the interactive map for routing, weather, and offline use.