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Leadville Trail 100 Mile Run

Leadville, United States • 16-17 Aug 2025

The Leadville Trail 100 Mile Run, known as the "Race Across the Sky," is a prestigious ultramarathon held annually in Leadville, Colorado. Established in 1983, this grueling event challenges participants with a 100-mile out-and-back course that features extreme elevation changes, reaching a peak of 12,600 feet at Hope Pass. Runners face over 18,000 feet of elevation gain, navigating rugged terrain and high-altitude conditions. The race has become a symbol of endurance and determination, attracting elite athletes from around the world. Finishers earn coveted belt buckles, with special recognition for those completing the race in under 25 hours. Visit the organization's website for the most recent information.

United States Colorado Leadville

Race information

Website
100 mi
15744 m+
100 Miles
Visit the organization's website for the most recent information.
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