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Outlast Denver

📅 October 2, 2027 (estimated date)📍 Littleton · United States

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (October 3, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

6 h

About

Outlast Denver is a 6-hour trail endurance challenge in Littleton, Colorado, starting at 8 a.m. on October 2, 2027. Participants must cover a 5K (3.1-mile) loop every hour, and each loop has to be completed within the hour to keep going; missing a loop means disqualification. The event puts the emphasis on pacing, discipline and mental toughness.

Runners who complete 4 or 5 loops earn patches, while those who finish all 6 receive a medal and can appear in the national rankings. The fastest runners in each category take home awards, and top competitors have the chance to win additional prizes in a championship race. Aid stations are provided, and participants are encouraged to bring their own water and gear.

D-349

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