Ouray 100 Mile Endurance Run

The Ouray 100 Mile Endurance Run is a challenging ultramarathon held in Ouray, Colorado, nestled in the scenic San Juan Mountains. Covering 100 miles with an elevation gain of approximately 41,862 feet, the course features fourteen significant climbs, including a final 5,000-foot ascent to the Bridge of Heaven. Known for its rugged terrain and breathtaking views, the race finishes at Fellin Park, where runners receive a distinctive belt buckle and can enjoy the nearby Ouray Hot Springs.

The event emphasizes a tough, no-frills atmosphere, requiring participants to complete volunteer service or pay an opt-out fee. Prize money is awarded to top finishers, contingent on drug testing. Visit the organization's website for the most recent information.