Colfax Marathon
Denver, CO, USA • May 17, 2026
Race Day Weather
47°
66° high
Breezy
Dry
Cool start, warming trend
Runners will face a temperature rise from 49°F at the start to 66°F by the finish. Winds will be from the SSE at 11 mph with gusts up to 26 mph, adding a slight challenge. With humidity at 52% and a dew point of 38°F, conditions remain comfortable, allowing for a steady pace throughout the race.
Race day forecast available in 27 days
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Distance: 26.2mi
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The Colfax Marathon (previously known as the Colorado Colfax Marathon) is an annual marathon foot-race held in Colorado, United States, since 2006. Significant portions of the course follow Colfax Avenue. Wikipedia
FAQ
When is the 2026 Colfax Marathon?
The 2026 Colfax Marathon will be held on Sunday May 17, 2026.
Is the Colfax Marathon a Boston Marathon Qualifier?
Yes, the Colfax Marathon is an official Boston Marathon qualifier.
What will the weather be like for the 2026 Colfax Marathon?
The forecast calls for a high of 66°F and a low of 47°F with a 0% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.
