The Colorado Marathon – Fort Collins, CO 2026

03/23/26 Full Marathon Update: The full marathon is officially sold out of both standard entries and Charity Fund entries. There will be no additional registration for the full marathon. 03/22/26 Half Marathon Update: The half marathon has sold out of standard entries! We have less than 25 Charity Fund entries left. Charity Fund entries are $340 for the half marathon and are the only way to register for the half marathon now. We reserve a limited number of Charity Fund entries where all proceeds go to the charities and non-profits that partner with the race. Once these are sold out, there will be no additional registration for the half marathon. Join us for the Colorado Marathon in Fort Collins this May! Our annual event takes place in the stunning Poudre Canyon and the gorgeous natural areas of Fort Collins in Northern Colorado. Each year, thousands of runners participate in this incredible event to test their endurance, push themselves to new heights, set new PRs, and race alongside