Denver's largest running weekend!
Join Denver’s largest running weekend for 2019! Choose the marathon, half marathon, or urban 10 miler and enjoy Denver’s iconic landmarks. Or create a relay team of five runners for one of the largest marathon relays in the U.S. – your team can be friends or work colleagues as we have Open, Corporate and Government divisions. Just getting started on the running scene? Try out the 5K.
Video: What You Will See
See highlights of the course before you run! Choose your distance of 26.2, 13.1, 10, 5k or split-up the marathon with a team of 5.
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 >
A Competition of Corporate Giving - Denver Business Journal
In 2018, the Denver Business Journal named 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.Learn More >
Half Marathon through Denver Zoo
Take a tour through the elephant exhibit, past the monkeys, and by the camels smiling at you on your way to 13.1 miles. Plus, firefighters from Aurora Fire will be cheering you on as you run through the firestation!Learn More >
Best Tent Award - Canine Companions for Independence
Canine Companions for Independence, a Colfax Marathon Charity Partner, enhances the lives of people with disabilities by providing highly trained assistance dogs and a lifetime of support. Their dogs cost $50,000 to prepare yet there is no charge to those that receive them.Learn more
Best Tent Award - Duet Design Group Foundation
Duet Design Group Foundation, a Colfax Marathon Charity Partner, believes that everyone should have access to relaxing, beautiful environments. They improve the lives of Denver area residents who are unable to take advantage of professional design services.Learn more
Best Tent Award - Friends Colorado
Friends Colorado, a Colfax Marathon Charity Partner, is dedicated to the prevention of bullying. Their education in schools and with youth sports clubs, is based on the kids’ voices, and tailored to each organization’s unique climate and needs.Learn More