Aspen Backcountry Marathon

Prepare for an unforgettable mountain challenge at the Aspen Backcountry Marathon, Half Marathon (14.6M), and 50K, set to take place on August 1, 2026, in stunning Aspen, Colorado. This premier trail event, known as "Aspen's most scenic running race," offers a true high-alpine experience, with courses beginning around 7,900 feet and ascending over 10,100 feet. Runners will navigate routes almost exclusively on dirt trails, featuring a diverse mix of terrain, from well-maintained single track winding through hushed aspen groves and wildflower meadows to challenging ascents and technical descents across forested and exposed high-altitude sections. The 50K distance adds a significant out-and-back to the iconic McNamara Hut, part of the 10th Mountain Hut System, pushing even the most seasoned athletes.

Spectacular panoramic views of the Elk Mountains and the charming city of Aspen below will reward every effort. While offering remote aid stations and essential course markings, the Aspen Backcountry Marathon is considered a limited support race, encouraging self-sufficiency and requiring runners to carry their own hydration cups for this cupless event. Typical race day conditions in early August bring pleasant highs around 75°F and lows around 49°F, with a minimal 9% chance of precipitation. The start and finish lines are conveniently located at Rio Grande Park, which comes alive on race day as the event coincides with Aspen's lively Annual Duck Derby, featuring live music, food trucks, and a festive atmosphere for runners and spectators alike. This demanding yet incredibly rewarding race is perfect for those seeking a profound connection with the Colorado wilderness and an experience you'll be bragging about for years.