DENVER COLFAX MARATHON AND YEAR ROUND EVENTS
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 day before 5K.
Leading up to the big running weekend, enjoy our other events. This starts in May with the Runners Reunion 5K and 10K, followed by Mile High Women’s 10K in August, and then in September we say with our feet Goodbye Summer 5k.
Join one of the country’s largest running communities all year long!
COLFAX MARATHON RESCHEDULE: Due to the impact of COVID, the Colfax Marathon is scheduled October 16-17, 2021. Race Weekend details will be finalized after the Broncos schedule is announced in April. (For example, a Sunday home game may mean the main race day will be on Saturday, not Sunday. The 5K would then change to Sunday). The Colfax Marathon will return to its historical May dates in 2022.If earlier this year you chose to defer to 2021, you will be emailed a personalized code to register for 2021. If your plans have changed, you will be able to choose to defer to 2022 at that time. Registration will open spring 2021 for new and deferred registrants.
Check out the video of the Denver Colfax Marathon weekend!
NEW RACES- Register Now
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 the Empower Field, our Colfax 5K, as well as our main race day with the Marathon, Half Marathon, Urban 10 Miler and Marathon Relay.WATCH THE VIDEO>
Denver's Only Marathon
Where to start? Boston Qualifier, through the Broncos Stadium 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>