Hardrock 100 Endurance Run

Embark on the ultimate test of endurance with the Hardrock Hundred Mile Endurance Run, an ultramarathon that navigates the breathtaking San Juan Range in Southern Colorado. Spanning 100 miles, this loop course features a staggering total elevation gain of 66,100 feet and an average elevation exceeding 11,000 feet, offering spectacular vistas at every turn. The route is a challenging blend of 4WD roads, dirt trails, and rugged cross-country terrain. Prepare to push your limits while honing your mountaineering, wilderness survival, and navigation skills in this exhilarating adventure.