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.
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.
- Ultra-distance entry in Marathon Scout; not a 26.2-mile Boston qualifier.
What is the Hardrock 100?
The Hardrock 100 is one of North America's most selective mountain ultras, circling the San Juan Mountains from Silverton. This Marathon Scout entry covers the 101.8-mile event as a high-interest ultra rather than a standard 26.2-mile marathon.
Hardrock 100 course route
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 | — | — |
Hardrock 100 FAQ
When is the Hardrock 100?
The 2026 Hardrock 100 is 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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