Twelvemile Lake

Managing agency

San Juan NF — Columbine RD

Twelvemile Lake is an 8.3-mile out-and-back trail located in Colorado near the San Juan National Forest's Columbine Ranger District. The route provides access to a mountain lake setting typical of the San Juan range, making it suitable for hikers seeking a moderate backcountry experience. The out-and-back format means you'll cover approximately 4.15 miles each way to reach the lake and return via the same route. This trail is maintained by the San Juan National Forest, ensuring regular upkeep and adherence to Forest Service standards. The area around Twelvemile Lake offers scenic views characteristic of Colorado's high country. The trail traverses terrain managed for both recreation and resource conservation. Given the San Juan National Forest's elevation and terrain, hikers should prepare for variable weather conditions and high-altitude hiking. This trail works well for day hikes or shorter backpacking trips. Before heading out, check with the Columbine Ranger District for current conditions, any seasonal closures, or recent trail updates. Standard outdoor precautions apply, including bringing adequate water, sun protection, and a map of the area.