Idaho Running Day Marathon

Boise, ID, USA · October 17, 2026
partly-cloudy-day47°·61° high·Breezy·Dry
9
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Race Day Weather

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47°at start
65° high
Breezy
Dry

Cool conditions, steady breeze

Runners will face a temperature rising from 47°F at the start to 62°F by the finish, with a mild wind from the S at 11 mph. Humidity will be moderate at 51%, providing comfortable conditions. It’s advisable to maintain a steady pace and stay hydrated, as the temperatures will gradually increase.

Race day forecast available in 144 days
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Distance: 26.2mi
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Race Info

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

Area Map

Course Map

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 67°F and a low of 44°F with a 8% chance of rain.

Historical Weather

Based on 2 years of data
Avg Temp
74°F
L:51° H:74°
RunScore
8
Conditions
Rain Freq
0%
0 of 2 yrs
Wind4mph
Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-night
38°/57°-
8
2024
clear-night
64°/92°-
8