2026 Denver Colfax Marathon

The Denver Colfax Marathon celebrates its 20th anniversary in 2026, solidifying its status as the largest running weekend in the Mile High City. Spanning two days of competition, the event centers around Denver’s iconic City Park and offers a diverse range of distances that highlight the city's unique urban landscape. Whether participants are looking for a solo challenge or a team-based experience, the weekend is designed to be an inclusive celebration of health and community spirit.

Managed by Team Colfax, the event serves as a major platform for local and national charities through its extensive Charity Partners Program. The marathon route is famous for its varied scenery, taking runners through traditional neighborhoods, stadium grounds, and past key metropolitan landmarks, ensuring a vibrant experience for all entrants.

Logistics and Participant Information:

• -- Mile High Two Day Challenge: Runners can maximize their weekend by participating in the Saturday 5K followed by any of the primary Sunday race distances.
• -- Location Hub: All major event activities and start/finish lines are concentrated within City Park, Denver, providing a central location for gear checks and post-race festivities.
• -- Corporate and Group Support: The organization provides streamlined registration services for companies, large groups, and charities through a dedicated multi-registration code system.
• -- Communication: Inquiries regarding sponsorship, charity involvement, or general race details are handled via specific electronic communication channels to ensure efficient participant support.
• -- Anniversary Year: As the 20th running of the event, the 2026 weekend is expected to feature commemorative elements celebrating two decades of running along the Colfax corridor.

With its early Sunday start times, the marathon allows runners to enjoy the cooler morning temperatures and the unique atmosphere of a city waking up to one of its most anticipated annual sporting traditions.