Colfax Marathon
Denver, CO, USA · May 16, 2027
Race Day Weather
46°at start
68° high
Light
Dry
Cool start — fast day potential, big temp swing
A cool 46°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 68°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.
Race day forecast available in 221 days
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Distance: 26.2mi
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Race weekend
Sunday, May 16
Marathon (26.2 mi)
Half Marathon (13.1 mi)
10M (10.0 mi)
5K (3.1 mi)
FAQ
When is the 2027 Colfax Marathon?
The 2027 Colfax Marathon will be held on Sunday May 16, 2027.
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 2027 Colfax Marathon?
The forecast calls for a high of 69°F and a low of 43°F with a 9% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.
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