Ouray 100 Mile Endurance Run

The Sky Pilots Ouray Backyard Ultra is a unique running event held in Ouray, Colorado, featuring a "last person standing" format. Participants complete a 4.167-mile course, and if they finish within an hour, they continue to run each hour until only one runner remains. The course is relatively easy,..

The San Juan Solstice 50 Mile Run is a challenging ultramarathon set in the stunning San Juan Mountains of Colorado. This annual event, taking place in June, attracts runners from various backgrounds, offering a unique opportunity to experience the breathtaking scenery and rugged terrain. Participan..

The Hardrock 100 is a challenging 100-mile ultramarathon held in the San Juan Mountain Range of Southern Colorado. Participants face a total elevation change of 66,394 feet, with an average elevation of over 11,000 feet, making it one of the most demanding endurance runs in the world. The course fea..

The Silverton Alpine Marathons, held in Silverton, Colorado, offers an exhilarating trail running experience through the stunning San Juan Mountains. Participants can choose from three race distances: a 50K, a marathon, or an 8-mile run, all set against a backdrop of historic mining ghost towns and ..

The Kendall Mountain Run, taking place in Silverton, Colorado, features a challenging 12-mile and 11K race that begins in downtown Silverton and ascends to the summit of Kendall Mountain at 13,066 feet. Participants will experience a thrilling climb, including a final vertical scramble, before desce..

The High Five 100 is an ultra-running challenge held in Lake City, CO, designed to test even the most elite runners. Participants must navigate on foot to 22 designated locations, including 6 checkpoints for crew support and 16 proof points to verify their journey. Runners can choose their own route..