Grindstone Loop

Managing agency

Rio Grande NF — Divide RD

Grindstone Loop is a 10-mile out-and-back trail located in Colorado near the Divide Ranger District of Rio Grande National Forest. The route features 2,180 feet of elevation gain, making it a moderately challenging hike suitable for experienced hikers. Managed by the Rio Grande National Forest, this trail offers access to the natural landscapes of south-central Colorado. The out-and-back format allows hikers to turn back at any point, providing flexibility for those wanting to adjust their distance based on fitness level or time constraints. The elevation gain is significant and distributed throughout the hike, so hikers should come prepared with adequate water and appropriate footwear. The trail is best visited during Colorado's warmer months when snow is not present at higher elevations. This trail is ideal for hikers seeking a full-day adventure with moderate to strenuous conditions. Check with Rio Grande National Forest—Divide Ranger District for current trail conditions, any closures, and specific parking information before your visit.