Colorado Marathon

MAY

3

2026

A mountain-course event near Fort Collins on May 3, 2026, offering full, half, 10K and 5K races through Poudre Canyon. The race emphasizes digital registration and sustainability and has served as an RRCA state championship in recent years.

Sun 3 May 2026

Fort Collins, Colorado

Website Registration

26 miles 13 miles 10 kilometers 5 kilometers

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Colorado Marathon - Fort Collins, Colorado

The Colorado Marathon is an annual road race set in the Poudre Canyon of the Rocky Mountains near Fort Collins. The event for 2026 is scheduled for Sunday, May 3, 2026, and features multiple distance options on courses routed along the Cache La Poudre River and through forested canyon scenery.

Course offerings include a full marathon that follows a predominantly downhill route, as well as shorter distances. Runners may change to a shorter distance to match their current fitness and ability. The race has been designated as the RRCA Colorado State Marathon Championship in 2023, 2024, and 2025, and historically the event has qualified a notable share of Boston Marathon entrants each year.

Organizers describe an emphasis on sustainability and reduced paper waste: registration is digital and the event aims to replace paper goody bags with electronic alternatives. The race also includes an expo and a post-race gathering for many participants. Fort Collins is noted in event materials for its downtown, dining scene, and local breweries, and typical May conditions are described with daily high temperatures commonly between 65 and 75 degrees Fahrenheit. Visit the organization's website for the most recent information.