Hardrock 100
Silverton, United States • 10 Jul 2026
Event overview
The Hardrock Hundred Mile Endurance Run is a 100-mile ultramarathon held in southwestern Colorado. The race reports a total elevation change of 66,394 feet (about 33,197 feet of climb and the same of descent) and an average course elevation of 11,186 feet. The course low point is listed at 7,680 feet (near Ouray) and the high point at 14,048 feet (Handies Peak). The event alternates course direction each year; the 2026 edition is a clockwise loop.
The event connects or passes near the historic mountain towns of Silverton, Lake City, Ouray, Telluride and Ophir. Parts of the operation take place on public lands under permit from the U.S. Bureau of Land Management and the U.S. Forest Service.
Course and event details
The route includes 4WD roads, dirt trails, and cross-country travel through the San Juan Mountain Range. The organizer runs a runner and volunteer manual and posts course maps and descriptions for competitors.
The 2026 lottery was scheduled for December 6, 2025. For 2025 the race materials note a scholarship program in its 26th year, distributing $47,000 in 2025 to six high school and ten continuing-education recipients and a cumulative total of $366,050 over the program’s history. Registration for the 2026 event had closed in October 2025. Visit the organization's website for the most recent information.