Run through Denver’s best landmarks in the 15th Anniversary Colfax Marathon with 7 different races to choose from!! Join Colorado's big running community reunion and achieve your goals on these flat courses!

Run 26.2 epic miles through the Broncos Stadium at Mile High, around Sloans Lake, along the Platte River, and back through the streets of Denver. Divide up the marathon course with a team of 5 for the Marathon Relay to win some money for charity!

The wild Half Marathon takes you on a one-mile trek through Denver Zoo (only race allowed!), through Aurora Fire Station #1, and down the flat shady course to the finish.

The Urban 10 Miler follows the final miles of the Marathon through the stadium!

Kick off marathon weekend at the Colfax 5K in City Park and celebrate your finish at the race afterparty in City Park!

Run for a good cause: 200 Charity Partners to choose from!

https://www.runcolfax.org/