Belmont · San Mateo County · CA
O'Neill Slough Trail is a 0.4-mile white trail near Belmont, in San Mateo County, CA. It climbs 0 ft and descends 4 ft, between 9 ft and a high point of 17 ft. The surface is asphalt. 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.