Leadville Trail Marathon
Leadville Trail Marathon is a high-altitude Colorado trail race to Mosquito Pass, with 26.4 rugged miles and a Leadville 100 qualifier draw.
Every link above goes to the race, its timing provider, or an official registration partner. Last checked August 4, 2026.
Quick facts
- High-altitude trail marathon in the Leadville Race Series.
- Course reaches Mosquito Pass at 13,185 feet.
- Marathon distance is listed as 26.4 miles.
- Leadville 100 qualifier coin drawing is part of race day.
- ChronoTrack results and SMS timing updates are linked by the race.
2027 Leadville Trail Marathon registration
Registration for the 2027 Leadville Trail Marathon runs through the official registration page at leadvilleraceseries.com.
About the Leadville Trail Marathon
Leadville Trail Marathon is the marathon-distance race in the Leadville Race Series. It is built for trail runners who want altitude, climbing, and mining-district terrain instead of a road PR course.
Course
The route covers 26.4 miles on dirt roads and singletrack east of Leadville, topping out at Mosquito Pass at 13,185 feet. The course is out-and-back, exposed, and hard to pace because altitude matters as much as grade.
Race-day weather
Late June in Leadville can bring strong sun, cold air, wind, rain, or snow on the high sections. Runners should plan for fast-changing mountain weather and slower effort at altitude.
Past Leadville Trail Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Saturday, June 27, 2026 | Completed | Open results |
| 2025 | Saturday, June 28, 2025 | Completed | Open results |
| 2024 | Saturday, June 29, 2024 | Completed | Open results |
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Leadville Trail Marathon FAQ
When is the Leadville Trail Marathon?
We're waiting for the finalized date for the 2027 Leadville Trail Marathon. The most recent running was on Saturday, June 27, 2026.
How do I register for the Leadville Trail Marathon?
Register for the Leadville Trail Marathon through the official registration link: marathonscout.com/go/leadville-trail-marathon/register. It opens the race registration page at leadvilleraceseries.com.
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