Mill Lake

Managing agency

Routt NF — Hahns Peak/Bears Ears RD

Mill Lake is a 3.3-mile out-and-back trail located in Colorado with 1,220 feet of elevation gain. The steady climb makes this a moderate hike suitable for hikers seeking a more challenging workout while accessing alpine scenery. The trail ascends through varied terrain typical of Colorado's mountain landscape, gaining elevation consistently throughout the route. The 1,220-foot elevation gain is distributed across the 1.65-mile approach to the lake, creating a sustained but manageable grade for most hikers in decent condition. Mill Lake offers a rewarding destination for the effort invested, providing a turnaround point before retracing the same route back to the trailhead. The out-and-back format means hikers can control their distance and intensity, making it accessible to those who prefer to turn back early. This trail is managed by the appropriate local agency and falls within a designated wilderness or protected area. The combination of moderate distance, significant elevation gain, and scenic alpine setting makes Mill Lake a solid choice for hikers looking to get a workout while accessing the natural beauty of Colorado's high country.