Dynamic Variation:

Colfax Marathon

Oct 16, 2021 - Oct 17, 2021


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.