Gallatin Gateway · Gallatin County · MT
Fs 421 is a 4.4-mile expert (double black) trail near Gallatin Gateway, in Gallatin County, MT. It climbs 2,617 ft and descends 385 ft, between 6,502 ft and a high point of 8,741 ft. The surface is dirt. Mapped for mountain biking, ohv.
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Trail data © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP. Open the interactive map for routing, weather, and offline use.