Lost Lake Trail

Managing agency

Pike-San Isabel NF — South Park RD

Lost Lake Trail is a 7.2-mile out-and-back route located in Colorado near Colorado. Managed by Pike-San Isabel National Forest's South Park Ranger District, this trail offers a moderate day hike experience in the South Park region. The out-and-back format means hikers will travel 3.6 miles to reach Lost Lake before returning via the same route. The trail traverses terrain typical of the Pike-San Isabel National Forest, providing access to alpine lake scenery. The area is managed by the Forest Service to maintain trail conditions and protect the surrounding landscape. This hike is suitable for day visitors looking for a half-day or full-day adventure. The Lost Lake destination makes for a clear turnaround point, and the out-and-back design eliminates navigation complexity. Hikers should check current conditions with the South Park Ranger District before heading out, as mountain trails can be affected by seasonal conditions and maintenance schedules.