Race Day


FREE SUNGLASSES:  Register now until August 6th and pick up a FREE pair of fun GOODR SUNGLASSES (retail $25) at participating Runner’s Roost Stores.  Next 500 to register only – so hurry!  Learn more here.

15th ANNIVERSARY:  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.

SAVE THE DATE:  Sunday May 15, 2022 is our 16th Anniversary race.

Check out the video of the Denver Colfax Marathon weekend!

Denver Colfax Marathon Weekend Details