2.7 mi of trail, end to end · about 2,200 ft of climbing · 3,945 ft–6,194 ft · native material surface · trail No. 900 · trail class 3 · typical grade trail_grade · tread 18-24 inches wide · hiking, horse, bike
TrailheadsO'brien Creek Lower Trailhead 3,950 ft Drive there · O'brien Creek Upper Trailhead 4,625 ft Drive there
O'brien Creek Lower Trailhead the Forest Service's write-up
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.
