San Juan National Forest · Colorado
Trailhead Cross Mountain Trailhead Drive there
The Cross Mountain Trailhead is the start of Cross Mountain Trail (637). The trail is 3.1 miles long. It begins at Forest Road 424 - Cross Mountain and ends at Lizard Head Trail (409). The trail is open for the following uses: Hiking, Horseback Riding.
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.