Hardrock 100
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About the race
The Hardrock Hundred Mile Endurance Run is a 100-mile loop ultramarathon in the San Juan Mountain Range of southern Colorado, based in Silverton. The course uses 4WD roads, dirt trails, and cross-country sections.
The route includes substantial altitude and elevation change: a total elevation change of 66,882 feet composed of 33,441 feet of climb and 33,441 feet of descent, with an average elevation of 11,186 feet. The course low point is 7,680 feet at Ouray and the high point is 14,048 feet at Handies Peak. Portions of the operation take place on public lands under special permit from the U.S. Bureau of Land Management and the U.S. Forest Service.
The event maintains a stated transgender and non-binary athlete inclusion policy that recognizes a non-binary division and respects self-declared gender during lottery and registration without documentary requirements, with formal eligibility challenges limited to top three finishers and handled confidentially. The event also administers the Joel Zucker Memorial Scholarships; in the most recent year $64,000 was awarded to graduating high school and continuing education students, and the program has awarded a total of $435,000 across past years.
Upcoming planned dates include a lottery application window in early October 2026, a lottery in December 2026, and a scheduled running in July 2027 in a counter clockwise direction. The run is supported by volunteers and organized race operations such as aid stations and course guidance. Visit the organization's website for the most recent information.
