Denver Colfax Marathon
Always double-check with the organizer's website! This page may contain affiliate links.
Event overview
The Denver Colfax Marathon weekend is a multi-race event held in Denver in mid-May 2026. The program includes a full marathon, a half marathon, an urban 10 miler, a marathon relay with multiple divisions, and a 5K kickoff on the runway. A two-day race expo takes place at Empower Field at Mile High on the Friday and Saturday before race day. The event is described as Denver's only marathon and marks its 20th year in 2026.
Race and course details
Distances offered:
- 26.2 km (Marathon)
- 13.1 miles (Half Marathon)
- 10 miles (Urban 10 Miler)
- 5K (Kickoff Runway event)
The marathon course is listed as a Boston qualifier and passes through Empower Field at Mile High twice. The half marathon includes one mile inside the Denver Zoo. The urban 10 miler is a point-to-point race that starts near RMCAD and finishes in City Park; the urban 10 miler bib includes an RTD ticket for return transit. The marathon relay is run by teams of five and includes Corporate, Government, Public School Teachers, and Open divisions. The marathon finish is in City Park with a post-race party that features live music, food, and drinks. Limited-edition 20th-year jackets are available in specified sizes and colors. Visit the organization's website for the most recent information.
