2015 is your year to run the 10th Anniversary Colfax Marathon! Denver's ultimate urban tour: Marathon, Half Marathon, 5-person Marathon Relay, Urban 10 Miler and one big after party in City Park! Join Firefly Autism by participating in Denver&#39;s largest running weekend! You have a variety of races to choose from, including the marathon, half marathon, urban 10-miler, marathon relay on Sunday, or the 5K on Saturday. If you&#39;re up for a challenge, you can opt for the Mile High Two-Day Challenge by participating in a race on Sunday and adding the 5K on Saturday. By participating in any of these races, you not only get to enjoy a thrilling running experience but also contribute to a noble cause, as some of the proceeds will go to support Firefly Autism.
So lace up your running shoes, join the excitement, and make a difference for Firefly Autism while enjoying Denver&#39;s vibrant running community! For Marathon Information <a href="https://www.runcolfax.org/races/marathon-relay/" target="_blank" rel="nofollow noopener noreferrer">https://www.runcolfax.org/races/marathon-relay/</a>
Firefly Website: https://fireflyautism.org/

Colfax Marathon

Pre-Race Review/ Lineup

Creigh Kelley, race director of Colfax Marathon since it started, is stepping down after 20 years.

Denver Colfax Marathon director stepping down

A recap on the record breaking 2024 Colfax Marathon in May.

Run and Give Back with the Colfax Marathon

Post-Race Review/ Results

A driver in a stolen vehicle drove on the race course of the 2024 Colfax Marathon narrowly missing runners.

Colfax Marathon runners almost hit by high-speed driver fleeing police

The 2024 Denver Marathon will be held on Sunday, May 19, with over 25,000 runners in all distances.

Marathon Summary

Marathon Results