Ouray 100 Mile Endurance Run
Always double-check with the organizer's website! This page may contain affiliate links.
Ouray 100 Mile Endurance Run : July 16, 2027
The Ouray 100 Mile Endurance Run is a 100 mile mountain ultramarathon held in Ouray, Colorado, with the primary venue at Fellin Park. The course is in the San Juan Mountain range and lists total elevation gain of 41,862 feet with fourteen climbs. The final ridge tops out at the Bridge of Heaven before a descent back to Fellin Park and the Ouray Hot Springs.
Organized by Ouray Ultras, the event includes pre-race packet pickup and a pre-race briefing the day before the race, race-day packet pickup and start, and post-race drug testing and awards. The 100 mile race uses a 52 hour race cutoff. Racers are required to carry a provided SPOT tracker; runner locations are updated every five minutes.
All participants must complete eight hours of volunteer service before July 1, or elect an opt out by making a $100 donation to the Ouray Trail Group. Entrants who have not submitted the service form or paid the opt out fee by July 10 will forfeit their registration and will not be permitted to participate.
The event is not a UTMB qualifier. Cash awards are listed for the top male and top female 100 mile finishers, and payment of those awards is subject to urine or blood drug testing that may include tests for steroids, testosterone, EPO, and THC. Podium awards are described as laser cut from traffic cones and the finishers receive a belt buckle. Visit the organization's website for the most recent information.
