Taking place on May 15–17, 2026, the Cigna Denver Colfax Marathon marks the 20th anniversary of the Rockies’ largest running weekend—featuring a robust lineup of races: a marathon, half marathon, urban 10-mile run, 5K, and both corporate and open marathon relays, plus an expo at Empower Field at Mile High. The marathon and half courses weave through Denver’s most vibrant neighborhoods, taking runners through Mile High Stadium twice, alongside the Denver Zoo, Fire Station No. 1, Cherry Creek, Sloan’s Lake, and multiple city landmarks with panoramic mountain views. As a Boston Marathon qualifier and one of the largest marathon weekends in the U.S., the event draws over 25,000 participants, offering a festival-like atmosphere with post-race celebrations, live music, and engaging course elements.
Races
Also on Sunday, 17 May 2026, the Urban 10 Miler travels from Denver’s Empower Field at Mile High through downtown and Cherry Creek before finishing in City Park, presented by the Colfax Marathon Partnership.
Also on Sunday, 17 May 2026, the Marathon Relay lets teams of five complete the 26.2-mile course in segments, with divisions for Open, Corporate, Government, and Public School Teachers. This event is run by the Colfax Marathon Partnership.
Weather based on historical averages.
FAQs
What is the Cigna Denver Colfax Urban 10 Miler?
How long is the Cigna Denver Colfax Urban 10 Miler?
Where does the Cigna Denver Colfax Urban 10 Miler take place?
What is the elevation gain of the Cigna Denver Colfax Urban 10 Miler?
How can I prepare for the Cigna Denver Colfax Urban 10 Miler?
How do I choose the right training plan for the Cigna Denver Colfax Urban 10 Miler?
Also on Sunday, 17 May 2026, the Urban 10 Miler travels from Denver’s Empower Field at Mile High through downtown and Cherry Creek before finishing in City Park, presented by the Colfax Marathon Partnership.
The Cigna Denver Colfax Urban 10 Miler is 16km long.
The Cigna Denver Colfax Urban 10 Miler takes place in Denver, CO, USA.
Runna classifies the Cigna Denver Colfax Urban 10 Miler elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Cigna Denver Colfax Urban 10 Miler?
Also on Sunday, 17 May 2026, the Urban 10 Miler travels from Denver’s Empower Field at Mile High through downtown and Cherry Creek before finishing in City Park, presented by the Colfax Marathon Partnership.
How long is the Cigna Denver Colfax Urban 10 Miler?
The Cigna Denver Colfax Urban 10 Miler is 16km long.
Where does the Cigna Denver Colfax Urban 10 Miler take place?
The Cigna Denver Colfax Urban 10 Miler takes place in Denver, CO, USA.
What is the elevation gain of the Cigna Denver Colfax Urban 10 Miler?
Runna classifies the Cigna Denver Colfax Urban 10 Miler elevation profile as Rolling.
How can I prepare for the Cigna Denver Colfax Urban 10 Miler?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Cigna Denver Colfax Urban 10 Miler?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Cigna Denver Colfax Marathon Relay?
How long is the Cigna Denver Colfax Marathon Relay?
Where does the Cigna Denver Colfax Marathon Relay take place?
What is the elevation gain of the Cigna Denver Colfax Marathon Relay?
How can I prepare for the Cigna Denver Colfax Marathon Relay?
How do I choose the right training plan for the Cigna Denver Colfax Marathon Relay?
Also on Sunday, 17 May 2026, the Marathon Relay lets teams of five complete the 26.2-mile course in segments, with divisions for Open, Corporate, Government, and Public School Teachers. This event is run by the Colfax Marathon Partnership.
The Cigna Denver Colfax Marathon Relay is 42km long.
The Cigna Denver Colfax Marathon Relay takes place in Denver, CO, USA.
Runna classifies the Cigna Denver Colfax Marathon Relay elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Cigna Denver Colfax Marathon Relay?
Also on Sunday, 17 May 2026, the Marathon Relay lets teams of five complete the 26.2-mile course in segments, with divisions for Open, Corporate, Government, and Public School Teachers. This event is run by the Colfax Marathon Partnership.
How long is the Cigna Denver Colfax Marathon Relay?
The Cigna Denver Colfax Marathon Relay is 42km long.
Where does the Cigna Denver Colfax Marathon Relay take place?
The Cigna Denver Colfax Marathon Relay takes place in Denver, CO, USA.
What is the elevation gain of the Cigna Denver Colfax Marathon Relay?
Runna classifies the Cigna Denver Colfax Marathon Relay elevation profile as Rolling.
How can I prepare for the Cigna Denver Colfax Marathon Relay?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Cigna Denver Colfax Marathon Relay?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Cigna Denver Colfax Marathon or Colfax Marathon Partnership. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Cigna Denver Colfax Marathon website.
