Idaho Running Day Marathon

Boise, ID, USA · October 17, 2026
clear-day45°·63° high·Light·Dry
9
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Race Day Weather

clear-day
45°at start
66° high
Light
Dry

Cool start — fast day potential, big temp swing

A cool 45°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 66°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 164 days
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Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
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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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Course Map

Course Map Unavailable

We don't have course map data for Idaho Running Day Marathon yet. If you have a GPX file (or other format) for this race, we'd love to add it!

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 66°F and a low of 45°F with a 0% 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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