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Aspen Backcountry Marathon

Aspen, United States • 2 Aug 2025

The Aspen Backcountry Marathon, held in Aspen, Colorado, offers three trail running distances: a 50K, a marathon, and a heavy half-marathon. The courses run almost entirely on dirt trails through the scenic Elk Mountains, featuring challenging ascents, descents, and significant elevation gains, with peaks over 10,000 feet. The 50K includes an out-and-back segment to the McNamara Hut of the 10th Mountain Hut System. The race starts and finishes at Rio Grande Park, coinciding with the Rotary Club's Duck Derby festival, which features live music, food trucks, and family activities. Aid stations provide light refreshments, and participants must carry a CORSAR card for search and rescue support. Visit the organization's website for the most recent information.

United States Colorado Aspen

Race information

Website Registration
50 km
50 Kilometer
42 km
Marathon
21 km
Heavy Half Marathon
Visit the organization's website for the most recent information.
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