Helena-Lewis and Clark National Forest · Montana

South Fork Judith River

6.5 mi of trail, end to end · about 650 ft of climbing · 1,200 ft of descent · 5,517 ft–6,331 ft · native material surface · trail No. 439 · trail class 3 · typical grade trail_grade · tread 18-24 inches wide · hiking, horse, bike, motorcycle, e-bike · motorized use allowed

6,331 ft 5,638 ft · 4.8 mi high 6,331 ft

Begins at the forest's mile 0, 46.7262, -110.4239 - 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.