Endurance Grid lists 4 adventure races in Colorado, from November 2026 to September 2027 across 4 cities.
The adventure race calendar in Colorado is busiest in June, August, and September, with races most often in Fort Collins.
Adventure racing combines several disciplines — trekking, running, mountain biking, and paddling — with navigation by map and compass between checkpoints over a single course. Events range from a few-hour sprint to multi-day expedition races, and are commonly raced in teams.
Because navigation is part of the challenge, route choice and decision-making matter alongside fitness, and there is not always a marked course to follow. The exact disciplines, distances, and team-size rules vary by event.
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