Lost Lake

Lost Lake is a short out-and-back trail located in Colorado near the Boulder Ranger District of Arapaho-Roosevelt National Forest. At just 0.2 miles with minimal elevation gain of 5 feet, this is an accessible walk suitable for visitors of all fitness levels, including families with young children and those with mobility considerations. The trail provides a straightforward route to Lost Lake, making it ideal for a quick outing or as part of a broader exploration of the Boulder Ranger District area. The flat terrain and brief distance mean visitors can complete the round trip in just a few minutes, though the actual experience at the lake itself may warrant a longer visit. Managed by the U.S. Forest Service through Arapaho-Roosevelt National Forest, the trail is maintained as part of the public lands recreation system. Whether you're looking for a leisurely nature walk, a spot to enjoy scenic views, or an easy introduction to hiking in the Colorado high country, Lost Lake offers a low-commitment option to access this natural feature.