Stillwater Pass (Idleglen Trailhead)
Grand Lake, CO
Managed by US Forest Service, Arapaho and Roosevelt National Forests, Sulphur Ranger District
- Vehicles allowed
- ATVDirt BikeADV4x4
- Season
- The MVUM service lists the roads and trails open 06/15-11/15 (seasonal), with a few exceptions (see flags); the Forest page names no calendar season of its own.Source: USFS national Motor Vehicle Use Map service, layer 2 Trails, small attribute query in a box around Idleglen, run 2026-10-05 and USFS national Motor Vehicle Use Map service, layer 1 Roads, small attribute query in a box around Idleglen, run 2026-10-05 · Oct 5, 2026
- Closures
Closures: not checked yet. Check with US Forest Service, Arapaho and Roosevelt National Forests, Sulphur Ranger District