Allenspark · Boulder County · CO
Boulder-Grand Pass trail (unmaintained) is a 0.3-mile advanced (black) trail near Allenspark, in Boulder County, CO. It climbs 35 ft and descends 467 ft, between 11,640 ft and a high point of 12,085 ft. 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.