Registration is Open for Marathon Weekend!--- Denver 5K on the Runway sold out... fast
Registration is OPEN for Marathon Weekend. Get the lowest pricing by registering early!
Thank you to all the Denver 5K on the Runway runners. We Made History! Check out results, photos from the morning, and more!
Experience the Colfax Marathon - in just one minute!
Check out our race in a one minute video!
Denver Colfax Marathon Weekend Details
Two Days, Seven Races
We are excited to host the Denver Colfax Marathon May 20-21, 2023. We’ll have our two-day Cigna Denver Colfax Marathon Expo at Empower Field at Mile High on on Friday and Saturday, May 19-20. Our 5K Kickoff will be on Saturday May 20th, and our main Race Day will be on Sunday May 21st, with the Marathon, Half Marathon, Urban 10 Miler and Marathon Relay (Corporate, Government and Open Relay Divisions).WATCH THE VIDEO>
Denver's Only Marathon
Where to start? Boston Qualifier, through Empower Field at Mile High twice, along miles of water, through a fire station, & ranked by Runner’s World! Finish your 26.2 into a huge post-race party with live music, food, & drinks.Learn More >
New! Half Marathon Course through Denver Zoo & Downtown
We’re adding more animals to our course this year! We’re adding Sea Lions to our Zoo route. So you’ll have one mile in Denver Zoo, plus you’ll run along Colfax with epic spots like VooDoo Donuts and Irish Snug, by the Capitol, inside Denver Fire Station #1, and along 17th Avenue into an awesome finish party with 20,000 new friends!Learn More >
Marathon Relay - Corporate, Government, Open
What’s better than running 26.2 miles through the Mile High City? Sharing the miles with friends! Get a team of five to run Denver’s only 26.2 mile Marathon Relay. Most teams run for fun. Others run for bragging rights and money for charity.
It’s the largest in the US – because of the fun! Companies and government entities enter multiple teams in their industry division – like Construction, Healthcare, or Public School Teachers. Friends enter the Open Division.LEARN MORE>
A Competition of Corporate Giving - Denver Business Journal
Denver Business Journal named in a recent year the Colfax Marathon “Denver’s corporate “it” charity of the year”, with an average of $100,000 awarded annually to charities through the Open, Corporate, and Government Relay divisions. Get your company teams together now!LEARN MORE>
Urban 10 Miler - a local's favorite
It’s the marathon course in just 10 miles! Perfect if you love the idea of running downtown, through the stadium, eclectic college campus, and waterways – but do not want to tackle a full 26.2 miles. It’s a point to point race, that starts a bit later at RMCAD, and then finishes with the marathon, half, and relay in City Park. Your bib has an RTD ticket to get back to your car. A Denver favorite!LEARN MORE>