The Colorado Marathon
About this race
03/23/26 Full Marathon Update: The full marathon is officially sold out of both standard entries and Charity Fund entries. There will be no additional registration for the full marathon.
04/21/26 - 12 pm Half Marathon Update: The half marathon is officially sold out of both standard entries and Charity Fund entries. There will be no additional registration for the full marathon.
Join us for the Colorado Marathon in Fort Collins this May! Our annual event takes place in the stunning Poudre Canyon and the gorgeous natural areas of Fort Collins in Northern Colorado.
Each year, thousands of runners participate in this incredible event to test their endurance, push themselves to new heights, set new PRs, and race alongside other running enthusiasts who share a passion for health and fitness. Many even run Colorado’s fastest race to qualify for the Boston Marathon! Regardless of why you join us at this momentous event, we’re happy to have you!
With one of the most scenic downhill courses in the state, four different distances to choose from, and a vibrant community-centric atmosphere, this is one race you don’t want to miss. But be quick! Our event sells out quickly, so register early to save your spot in the race. Keep reading to learn all the details about this thrilling running adventure!
Note: Once a race reaches capacity, a limited number of entries are reserved for the "Charity Fund." These entries are double the price and all proceeds go to local charities and non-profits that are involved in the race. Once we hit the Charity Fund entries, this is the only way to register for that distance. Once the limited number of Charity Fund entries are sold, the race will be officially sold out and registration for that distance will be closed.
You will be able to register or change distances at the expo on Friday or Saturday of race weekend. However, if a race has reached capacity, there will be no new registration or changes to that distance.
Questions? Visit our website for more information here.
Pick your distance
Running
2027 Marathon
2027 Half Marathon
2027 10k
2027 5k
Typical race-day weather
Based on 12 years of Open-Meteo archive data for this event's race dates in Fort Collins, plus the 3 days either side.
The sun rises at 5:57 AM and sets at 7:56 PM local time (MDT) in Fort Collins on May 2, 2027 — 13h 59m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Results — The Colorado Marathon
Other races near Fort Collins
Different organizers, within 40 miles, in the next three months
OTILLO Swimrun Colorado
The Long View Marathon
Blue Sky Trail Marathon & Half Marathon
Colorado 24 Hour Run
🏃 Plan Your Next Race in Fort Collins
Find upcoming events by distance:
- Fort Collins 5K Races 22 races
- 10K Run Events in Fort Collins 2 races
- Fort Collins Half Marathons 5 races
- Marathons in Fort Collins 2 races
- Fort Collins Running Calendar 2026 39 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 44 Fort Collins events
Spotted something wrong? Tell us and we'll fix it.