Hardrock 100
Hardrock 100 is a 101.8-mile San Juan Mountains loop from Silverton with 33,441 feet of climbing, high passes, and a remote alpine finish at the rock.
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Hardrock 100 quick facts
- 101.8-mile San Juan Mountains loop from Silverton.
- About 33,441 feet each of climbing and descending, with high points over 14,000 feet.
- Lottery-driven field and remote aid-station logistics make planning unusually important.
- Altitude, exposed passes, and storm risk make mountain experience essential.
About the Hardrock 100
The Hardrock 100 is one of North America's most selective mountain ultras, circling the San Juan Mountains from Silverton. The 101.8-mile loop is defined by high passes, remote aid-station logistics, and unusually deep mountain experience requirements.
Hardrock 100 course description
The loop travels through Silverton, Lake City, Ouray, and Telluride country, with long climbs, technical descents, and extended time above treeline. The route lists 33,441 feet of ascent and descent, with an average elevation near 11,000 feet.
Weather for the Hardrock 100
July in the San Juans can shift from cool sunrise conditions to strong alpine sun, hail, and nighttime cold. Runners should expect altitude, exposed passes, and mountain storms to shape pacing more than flat mileage.
Past Hardrock 100 dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Friday, July 10, 2026 | Completed | Open results |
| 2025 | Friday, July 11, 2025 | Completed | Open results |
| 2024 | Friday, July 12, 2024 | Completed | Open results |
Hardrock 100 FAQ
When is the Hardrock 100?
We're waiting for the finalized date for the 2027 Hardrock 100. The most recent running was on Friday, July 10, 2026.
How do I register for the Hardrock 100?
You can register for the Hardrock 100 at ultrasignup.com.
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