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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, including a peak at 12,600 feet. Runners face over 18,000 feet of elevation gain, navigating rugged terrain and steep climbs. The race has become a symbol of endurance and determination, attracting elite athletes from around the world. Participants aim to finish within 30 hours to earn a coveted belt buckle, with a special distinction for those completing it 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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