Helena-Lewis and Clark National Forest · Montana

Rock Dam

1.3 mi of trail, end to end · about 300 ft of climbing · 6,265 ft–6,585 ft · native material surface · trail No. J15958 · trail class 2 · typical grade trail_grade · tread 96-120 inches wide · hiking, horse, bike, motorcycle, atv, 4wd, e-bike, snowmobile · motorized use allowed

6,265 ft 6,575 ft · 0.9 mi high 6,575 ft

Begins at the forest's mile 0, 46.5132, -110.6038 - no trailhead mapped Drive to where the trail begins

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About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.