The Hardrock Hundred Mile Endurance Run is one of the most prestigious and challenging ultramarathons in the world. Based in Silverton, Colorado, the course traverses the high-altitude terrain of the San Juan Mountains, passing through historic towns like Telluride and Ouray. With over 66,000 feet of elevation change, this race tests the limits of human endurance. Participants must be prepared for extreme conditions and technical trails in this iconic mountain running event.
What to Expect
A highly technical and physically demanding race that requires significant preparation and mountain running experience.
Who Should Attend
- Elite ultramarathoners
- Trail runners
- Endurance athletes
- Mountain running enthusiasts
Agenda Overview
The race begins at 6:00 AM on July 10, 2026, in Silverton, Colorado.
Venue & Address
Organizer
Hardrock Hundred Mile Endurance Run · Non-profit
Organizers of the premier high-altitude endurance run in the San Juan Mountains.
Frequently Asked Questions
What is the distance?
The race is 100 miles long.
Where does it start?
It starts and ends in Silverton, Colorado.
How much elevation gain is there?
The total elevation change is 66,528 feet.
Is there a lottery?
Yes, entry is determined through a lottery system.
What towns does it pass through?
The course passes through Telluride, Ouray, and Sherman.
When is the race?
The 2026 race is scheduled for July 10.
Tags
ultramarathon
running
Colorado
mountains
endurance
sports
Summary
A world-renowned 100-mile trail race through the Colorado mountains.
Highlights
- 100-mile course
- 66,528 feet elevation change
- San Juan Mountains scenery
- Historic town checkpoints
- Elite endurance challenge
- High-altitude terrain
More in Silverton
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