Illinois Pass

Managing agency

White River NF — Aspen-Sopris RD

Illinois Pass is a 3.6-mile loop trail located in Colorado near Aspen, managed by the White River National Forest's Aspen-Sopris Ranger District. The trail offers hikers a moderate option for exploring the surrounding alpine terrain characteristic of this region of the Rocky Mountains. The loop format allows hikers to complete a full circuit rather than retracing their steps, making for a more varied experience. The trail traverses terrain typical of the Aspen area, providing views and access to the natural landscape managed by the White River National Forest. This trail is suitable for hikers seeking a moderate-distance outing in the Colorado high country. The 3.6-mile distance makes it accessible for a half-day hike, though hikers should prepare for conditions and elevation associated with Colorado mountain terrain. For current trail conditions, closures, or specific details about parking and trailhead access, contact the Aspen-Sopris Ranger District of the White River National Forest directly.