Leadville Trail Marathon and Heavy Half

Leadville, United States • 28 Jun 2025

The Leadville Trail Marathon and Heavy Half are challenging trail running events held in Leadville, Colorado, traversing historic mining district trails. The marathon covers 26.4 miles with 6,167 feet of elevation gain, while the Heavy Half is 15.4 miles with 3,421 feet of gain. Both courses reach the highest point at Mosquito Pass, 13,185 feet, making it the highest trail marathon in the USA.

The out-and-back routes feature dirt roads and single track, marked with ribbons and flour arrows. Aid stations provide hydration and nutrition. The race offers a rugged, high-alpine atmosphere with potential extreme weather, demanding grit and determination from participants. 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.
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