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

partly-cloudy-day
47°at start
65° high
Breezy
Dry

Cool morning, warming afternoon

Runners will face a start temperature of 47°F, rising to 62°F by the finish. Wind will be from the S at 11 mph with gusts up to 23 mph, providing a slight headwind. With humidity at 51% and dry conditions expected, hydration should be maintained, but runners can maintain their pace as temperatures remain comfortable.

Race day forecast available in 68 days
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Pace Calculator

Distance: 26.2mi
0:00:00
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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

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FAQ

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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 6% 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 Idaho Running Day Marathon

Clear conditions throughout the day.

2025
clear-night
38°/57°-
8

2024 Idaho Running Day Marathon

Clear conditions throughout the day.

2024
clear-night
64°/92°-
8

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