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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, it challenges participants with a grueling 100-mile out-and-back course that features extreme elevation changes, reaching a peak of 12,600 feet at Hope Pass. The event has become iconic in the endurance running community, attracting athletes from around the world who seek to test their limits in high-altitude conditions. Runners aim to complete the race within 30 hours to earn a coveted belt buckle, symbolizing their achievement in this legendary race. 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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