COLFAX MARATHON - REGISTRATION IS OPEN, DEFERRALS, BRONCOS
REGISTRATION IS OPEN!
October 16-17, come to the Mile High City and celebrate the 15th running of Denver Colfax Marathon! This is the largest running weekend in the Rockies that includes a Marathon, Half Marathon, Urban 10 Miler, Marathon Relay and 5K.
COLFAX MARATHON – BRONCOS IMPACT: With the Broncos having a home game on Sunday, we’ll have our main Race Day – Marathon, Half Marathon, Urban 10 Miler and Marathon Relay on Saturday, October 16th. The 5K will be Sunday, October 17th.
DEFERRALS: If you chose to defer to 2021, you were emailed a personalized code (non-transferrable) to register for 2021 on April 30th.
Check out the video of the Denver Colfax Marathon weekend!
NEW RACES IN 2021
Join one of the country’s largest running communities all year long!
Runner’s Reunion results are now posted.
Mile High Women’s 10K registration is now open.
Denver Colfax Marathon Weekend Details
15th Anniversary of the Colfax Marathon
We are excited to celebrate the Colfax Marathon’s 15th Anniversary in 2021. There will be a full week of festivities, including Colorado Running Hall of Fame, Movie Night, Colfax Night Out and more. We’ll have our two day Health & Fitness Expo at Empower Field at Mile High (Club Suites), our main race day Saturday with the Marathon, Half Marathon, Urban 10 Miler and Marathon Relay. And our Colfax 5K on Sunday.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
A brand new course for the 15th anniversary taking you through Denver Zoo, 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 more than $100,000 awarded 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>