Run the Colfax Marathon:
Denver’s Marathon

This is your year to run the Marathon: 26.2 epic miles at 5280’ altitude – and zero attitude.

It’s the Ultimate Urban Tour of Denver.  Start and finish in Denver’s City Park. Run through Broncos Stadium at Mile High – twice! Run through Denver Fire Station #1, along seven miles of rivers, lakes and bridges – including Sloan’s Lake. Race through eclectic neighborhoods, historic Lakewood, the bustle of Colfax Avenue, and downtown Denver – with views of the majestic Rocky Mountains!

26.2 miles at 5,280 feet elevation? This is one for the bucket list. The Colfax Marathon is a Boston Marathon qualifier race.

Virtual Photo Tour

Cruise to the bottom of the page and take the virtual photo tour to view the fun sites along the course!

Runner Perks

Great tech shirts, car decals, and awesome finisher medals for each runner with detachable mini-medallions for your keychain or necklace. Free runner tracking and digital on-course photo!  Don’t miss the awesome afterparty and Michelob Ultra Beer Garden lakeside in City Park.

Colfax Double Marathon Challenge

It’s back for the 3rd year!  We are issuing a challenge to all the marathon runners in the world … run a marathon race in early 2020 (between Jan 1-May 16, 2020) and then Denver’s Colfax Marathon! You get a sweet gift  and bragging rights that you can run 26.2 anywhere including Denver at a mile high.  More scoop hereSpecial consideration if you ran the Dallas Marathon – if you ran Dallas in December, 2019 we’ll count that as your “other marathon”.   


Set a new event record, win $1,000. Set a new state record, win an additional $1,000. See the times to beat. Age group awards are great keepsakes! Overall and masters awards are based on gun time (1st, 2nd, 3rd). Age group awards are by chip time (1st, 2nd, 3rd) in categories: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, 70+.

Run for Charity

Run for one of the largest Charity Partner programs in the country! Over 200 charities participated in 2019. Choose a charity to run for when you register and they will contact you.

Training & Runs

Announcing the Colfax Training Series! Our Colfax Marathon Ambassadors will join Featured Running Clubs and running stores with Colfax drawings for great schwag. Check the TRAINING section for the up-to-date calendar – and great training tips.

Packet Pick Up & Race Day Logistics

Pick up Race Packets Friday and Saturday, May 15-16, 2020 at the Health & Fitness Expo. No Race Day Packet Pick Up. Detailed race day logistics will be posted in April.

Photo Tour

Hover over each photo to learn fun facts!