Idaho Running Day Marathon
Boise, ID, USA • October 17, 2026
Race Day Weather
45°
66° high
Light
Dry
Cool start, warming trend
Runners will face a temperature rise from 45°F at the start to a peak of 65°F. Wind will be light at 8 mph from the S, with occasional gusts up to 30 mph. With average humidity at 50%, it's advisable to maintain a steady pace and stay hydrated as temperatures increase.
Race day forecast available in 184 days
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Distance: 26.2mi
0:00:00
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As Boise's premier athletic event in the Treasure Valley, we offer a range of distances to suit every runner: full marathon, half marathon, 10K, and 5K. Our race is a Boston qualifier and takes place along the picturesque Boise Greenbelt, from Lucky Peak Reservoir to Southeast Boise, with stunning views of the Boise River. Source
FAQ
When is the 2026 Idaho Running Day Marathon?
The 2026 Idaho Running Day Marathon will be held on Saturday October 17, 2026.
Is the Idaho Running Day Marathon a Boston Marathon Qualifier?
Yes, the Idaho Running Day Marathon is an official Boston Marathon qualifier.
What will the weather be like for the 2026 Idaho Running Day Marathon?
The forecast calls for a high of 66°F and a low of 45°F with a 0% chance of rain.