Denver Colfax Half Marathon

Denver, United States of America 18 May, 2025

The Denver Colfax Half Marathon offers a unique urban running experience in the heart of Colorado’s capital. Starting near City Park, the course takes runners through diverse neighborhoods, a fire station (yes, really!), and even onto Colfax Avenue, the longest commercial street in the U.S. The mile-high altitude adds an extra challenge, but the stunning Rocky Mountain backdrop makes it all worthwhile. With a mix of city streets, park paths, and enthusiastic onlookers, this half marathon is an unforgettable way to explore Denver.

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Generic Half Marathon Time This represents the time you would expect to run a "generic" half marathon in. This is a half marathon with around 100 m (300 ft) of elevation gain and a temperature around 10°C (50°F). For best results, use our Race Predictor.

hours : minutes : seconds

Denver Colfax Half Marathon Time

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Statistics

Elevation
Elevation Gain	80 m	262 ft
Elevation Low	1600 m	5249 ft
Elevation High	1633 m	5358 ft
Weather
Expected Temperature (Low)	7°C	45°F
Expected Temperature (High)	23°C	73°F
Chance of Rain	55%

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The Denver Colfax Half Marathon offers a unique urban running experience in the heart of Colorado’s capital. Starting near City Park, the course takes runners through diverse neighborhoods, a fire station (yes, really!), and even onto Colfax Avenue, the longest commercial street in the U.S. The mile-high altitude adds an extra challenge, but the stunning Rocky Mountain backdrop makes it all worthwhile. With a mix of city streets, park paths, and enthusiastic onlookers, this half marathon is an unforgettable way to explore Denver.