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.