Running events and triathlons in Denver (CO): an overview of all runs and triathlon competitions in Denver.
Information on all races in Denver, including dates, registration, course, schedules and results.
Denver Running: Mile High Challenge and Colfax Views
Running in Denver, the "Mile High City," is an immediate and unforgettable challenge due to its extreme elevation of 5,280 feet. The Denver Colfax Marathon and Half Marathon is the city’s premier distance event. While the course itself is relatively flat for a city nestled next to the Rocky Mountains, runners must contend with the thin air, which makes proper pacing and acclimatization essential. Every breath is earned here, but the effort is rewarded with one of the most scenic urban races in the country.
The Zoo, Capitol, and Stadium Tour
The course offers a truly unique city tour, with the marathon being the only race in the world that runs directly through the Denver Zoo, past the elephants and lions—giving a whole new meaning to chasing a fast time. The route also weaves through the city's historic districts, past the State Capitol, and often through the massive downtown sports stadiums. The half marathon distance is immensely popular, allowing participants to enjoy the city’s best parks and sights, including the famous blue steps of the Capitol, with less total mileage.
The events culminate with an energetic finish line celebration that emphasizes the community’s resilience and athleticism. Whether you are tackling the full distance to conquer the high altitude and run through the zoo, or enjoying a shorter race cheered on by spectators against the stunning backdrop of the Rockies, running in Denver delivers a rigorous, visually spectacular, and distinctly Western running adventure.
To the overview of all events in our race calendar:
Running Races 2026 in Denver (Colorado)
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