Denver Colfax Marathon

Denver Colfax Marathon Weekend, in Denver, Colorado, is billed as Denver's only marathon and offers Marathon, Half Marathon, Urban 10 Miler, Marathon Relay, and a 5K on the Runway. It’s promoted as the Rockies’ largest marathon weekend, featuring a two-day Expo at Empower Field at Mile High and a Sunday race through downtown landmarks. The Half Marathon includes a Denver Zoo Mile with animal spectators, while the Urban 10 Miler is a point-to-point course finishing in City Park.

Finisher festivities include a post-race party, live music, and charity-focused relay divisions; 2026 marks the 20th year. Visit the organization's website for the most recent information.