| Hardrock Hundred Mile Endurance Run | |
|---|---|
 Photo taken during 2006 race. Grant Swamp Pass, 12,900 ft (3,900 m) | |
| Date | July |
| Location | Silverton, Colorado |
| Event type | Ultramarathon trail run |
| Distance | 102.5-mile (165.0 km) |
| Established | 1992 |
| Course records | Men: François D'Haene 21:45:50 (2021, counter-clockwise) Ludovic Pommeret 21:33:06 (2024, clockwise) Women: Courtney Dauwalter 26:14:12 (2023, counter-clockwise) Courtney Dauwalter 26:11:49 (2024, clockwise) |
| Official site | https://www.hardrock100.com/ |
The Hardrock Hundred Mile Endurance Run is an ultramarathon 102.5 miles (165.0 km) in length, with 33,000 feet (10,000 m) of climb at an average elevation of over 11,000 feet (3,400 m). The race is held on a loop course on 4WD roads, dirt trails, and cross country in Southern Colorado's San Juan Range, US. The race is dedicated to the memory of the miners who settled in the area and who built the mining trails on which much of the race is run. The race is directed by Dale Garland.