Alamosa Rock
5.5 mi of trail, end to end · native material surface · trail No. 703 · trail class 2 · typical grade 12-20% · tread 18-24 inches wide · hiking, bike, motorcycle, e-bike · motorized use allowed
Campgrounds
Along the way Comstock Campground
Begins at the forest's mile 0, 37.3924, -106.3824 - no trailhead mapped Drive to where the trail begins
Alamosa Trailhead and Trail 703 the Forest Service's write-up
Alamosa trailhead is just west of the junction of FDR 250 and FDR 260. There is limited parking here. Trail 703 begins here and goes to Comstock Campground on Rock Creek. The trail climbs steeply out of the Alamosa canyon, then becomes easier after the top is reached. It intersects with Trail 704 near the top. The descent into Comstock Campground is not as steep as the Alamosa Canyon side. The trail is open to motorcycle riding, mountain biking, horseback riding, and hiking.
This trailhead on fs.usda.gov
Every trail in Rio Grande National Forest
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.
