The Colorado Marathon

The Colorado Marathon is a road race in Fort Collins, typically held on the first weekend of May. It includes a full marathon, half marathon, 10K, 5K, and a children's run. The full marathon begins early, attracting thousands of participants, ranging from local residents running shorter distances to marathoners aiming for a personal best or a Boston Marathon qualification. The marathon route follows the Poudre River Canyon for most of its distance before entering Fort Collins' natural areas and concluding in the city. This predominantly downhill course is a significant draw; in its initial four years, 18% of participants achieved a Boston Marathon qualifying time. Originally named the Fort Collins Old Town Marathon, the event maintains a local focus through charity entries, which are priced higher with proceeds directed to local charitable organizations.