Colfax Marathon
Denver, CO, USA • May 17, 2026
Race Day Weather
47°
66° high
Breezy
Dry
Cool start, steady conditions ahead
Runners will face a temperature rise from 49°F at the start to a comfortable 66°F by the finish. With a light wind from the SSE at 11 mph and humidity at 52%, conditions will remain favorable. Runners should maintain their pace and stay hydrated throughout, as the weather is dry and pleasant.
Race day forecast available in 29 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.
