Colfax 5K
Come run City Park in the Colfax 5K! Go for a PR in this chip-timed race – separate stroller-friendly start wave for families and walkers. And, you can run with your dog in the dog wave, and get a fun dog bandana sponsored by Sploot Veterinary Care! Afterparty with live music. A great chance to be a part of Marathon weekend – at a much shorter distance.
NOTE! – We have two 5K’s. The main 5K is at 9:00am, and there is an additional 5K on Saturday for just the Girls On The Run starting at 10:30 if you’d like to stay and watch. The Girls on the Run 5K has a great hat for paid participants and items, and dogs are not allowed.
Special thank you to Taiwan Tourism Administration, Presenting sponsor of the Colfax 5K.
Runner Perks & Awards ... and Dogs!
For the main 5K at 9am:
Cool tech shirt and Free runner photos. Finish Line Food, Music, and Expo. Dog-Friendly Waves! Stroller-Friendly Family and Walk Wave.
Awards for top 3 male and female overall – based on gun time. Age Group Awards — Top 3 male and female in 12 and under, 13-19, 20-29, 30-39, 40-49, 50-59, 60-69, and 70+ based on chip time.
Great Shirts
For the main 5K at 9am participants receive a shirt. See the 2026 shirt up close by clicking here!
5K course
We are excited to have our 5K course Start and Finish at the Marathon Start and Finish Line! The course wraps around City Park and Ferril Lake with terrific views of downtown and the mountains. Click here to see the Colfax 5K course map.
Run for Charity
Run for one of the largest Charity Partner programs in the country! 150 charities participate each year. Choose a charity to run for when you register and they will contact you.
Pick Up & Race Day Logistics
Pick up Race Packets Friday before the race at the Cigna Denver Colfax Marathon Expo at Empower Field at Mile High. More expo details to come closer to race – OR pick up your packet on race day starting at 7:30 a.m. in City Park. Note – Late Registration and Packet Pickup will be located in our Festival area in a row of tents – south of the Start Corrals. The Finish Line Festival and Start Line area are in City Park – between the Denver Museum of Nature and Ferril Lake.
