Ouray 100 Mile Endurance Run
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Ouray 100 Mile Endurance Run
The Ouray 100 Mile Endurance Run is a single-event 100 mile mountain race held in Ouray, Colorado on July 17, 2026. The course runs through the San Juan Mountain range and includes approximately 41,862 feet of elevation gain spread across fourteen climbs. The final major ascent reaches the Bridge of Heaven, after which the route descends back to Fellin Park and the nearby Ouray Hot Springs. A belt-buckle award and podium items laser cut from traffic cones are presented to finishers.
The event enforces participant requirements and race rules. Each entrant must complete eight hours of volunteer service before July 1 or make a $100 donation to the Ouray Trail Group to opt out; entrants who have not submitted a service form or paid the opt out fee by July 10 forfeit their registration fee and are not permitted to participate. The race uses a 52 hour cutoff for the 100 mile distance.
Top finishers in the 100 mile event are eligible for a cash purse payable after postrace urine and/or blood testing. Banned substances tested for may include steroids, testosterone, EPO, and THC; THC levels above 150 ng/ml will trigger a positive result. Racers are required to carry an organizer-provided SPOT tracker during the race, with location updates approximately every five minutes. The event is no longer a UTMB qualifier beginning in 2022. Visit the organization's website for the most recent information.
