Leadville Trail Marathon and Heavy Half

Leadville, United States • 28 Jun 2025

The Leadville Trail Marathon and Heavy Half is a challenging running event set in the historic mining district of Leadville, Colorado. Participants can choose between a 26.4-mile marathon or a 15.4-mile Heavy Half, both featuring rugged trails and high-altitude terrain, with the marathon reaching an elevation of 13,185 feet at Mosquito Pass. Known for its breathtaking views and demanding conditions, this race is considered one of the toughest marathons in the nation. The event emphasizes safety, environmental responsibility, and community involvement, making it a unique experience for both runners and spectators. Visit the organization's website for the most recent information.

Race information

26 mi
6167 m+
Marathon
15 mi
3421 m+
Heavy Half
Visit the organization's website for the most recent information.
Trail runs nearby

The Collegiate Peaks Trail Run, celebrating its 35th anniversary in 2025, is a renowned trail running event held in Buena Vista, Colorado. Participants can choose between two challenging distances: 25 miles and 50 miles. Established in 1991, the race features a scenic course that follows single-trac..

The Spirit Trail Race is an exciting running event held in Buena Vista, Colorado, during Memorial Day Weekend. Participants can choose from various race distances, including a marathon, half-marathon, and 9k. The race promotes community engagement by donating proceeds to local organizations such as ..

The Vail Hillclimb will take place in Vail on Saturday 5 July 2025.

The Alma Foundation Race in the Clouds Dirt Festival is an exciting outdoor event taking place in Alma, Colorado, from July 10 to July 13, 2025. Set at an elevation of 10,600 feet, the festival features a variety of activities including mountain bike racing, trail running, a free kids' bike race, an..

The Silverheels Trail Runs, part of the Human Potential Running Series, will take place on July 11-12, 2025, in Como, Colorado. This annual event features multiple race distances, including a 100-Mile, 100k, 50-Mile, 60k, 19-Mile, and 10-Mile, catering to a variety of runners. The courses, set at an..

The Leadville Silver Rush 50M is a challenging 50-mile trail run set against the stunning backdrop of the Rocky Mountains. Participants will navigate a course featuring significant elevation gain, technical climbs, and breathtaking views, making it a true test of endurance and skill. The event serve..