Costo Lake

Managing agency

Routt NF — Hahns Peak/Bears Ears RD

Costo Lake is a 3.7-mile out-and-back trail located in Colorado near Colorado, managed by Routt National Forest's Hahns Peak/Bears Ears Ranger District. This straightforward route takes hikers to an alpine lake in the northern Colorado backcountry. The trail follows a moderate path through forest terrain typical of the Routt National Forest region. The out-and-back format means you'll retrace your steps on the return journey, covering approximately 7.4 miles total roundtrip distance. The Hahns Peak/Bears Ears Ranger District maintains this trail as part of a larger network of recreational routes in the area. This location is ideal for hikers seeking a day hike to a mountain lake destination without requiring technical climbing skills. Best approached during the summer and early fall months when snow is absent from higher elevations, Costo Lake offers access to the natural features of northern Colorado's mountainous terrain. The trail is suitable for hikers with moderate fitness levels looking for a lake-based destination in the Routt National Forest.