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!

The Denver Colfax Marathon announced today that Cigna is continuing its title sponsorship for the 2023 Denver Colfax Marathon. This renewed partnership comes with a greater emphasis on bolstering the health and wellbeing of the Denver community.

Cigna Renews Title Sponsorship with Denver Colfax Marathon

Colfax Marathon

Post-Race Review/ Results

A gallery of photos taken during the 2022 Colfax Marathon on Sunday, May 15.

Race Day in Photos: CU Denver Sponsors Iconic Colfax Marathon

Tyler McCandless won the 2022 Colfax Marathon in 2:21:07.

A rite of spring returns as Colfax Marathon races attract 16,000 runners

Pre-Race Review/ Lineup

The 2022 Colfax Marathon is set on Sunday, May 15.

Marathon Summary

Marathon Results