Glendora · Los Angeles County · CA
Upper Colby Trail is a 1.3-mile expert (double black) trail near Glendora, in Los Angeles County, CA. It climbs 137 ft and descends 1,087 ft, between 1,543 ft and a high point of 2,588 ft. Mapped for hiking, trail running, mountain biking.
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Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Open the interactive map for routing, weather, and offline use.