The 2026 Colfax Marathon has concluded.
Colfax Marathon
Race complete
Denver, CO, USA · May 17, 2026
Race Day Weather
52°at start
67° high
Windy
Dry
Rainy start, steady winds ahead
Runners will face a starting temperature of 51°F, rising to 67°F by the finish. A light rain is expected throughout with a max wind of 19 mph from the ESE, creating a headwind effect. Adjust pacing strategies early and consider hydration needs, especially as temperatures rise.
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Distance: 26.2mi
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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 67°F and a low of 45°F with a 100% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.
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