Idaho Running Day Marathon

Boise, ID, USA • October 17, 2026
Register

Race Day Weather

clear-day
45°
66° high
Light
Dry

Cool temperatures, steady winds

Runners will face a temperature rise from 45°F to 65°F, with a maximum wind speed of 8 mph from the S. Humidity will remain moderate at 50%, with a dew point of 33°F. With these conditions, runners should maintain a steady pace and remain mindful of hydration as temperatures climb.

Race day forecast available in 204 days
clear-night8
clear-night8
partly-cloudy-night8
partly-cloudy-night8
clear-day9
clear-day9
clear-day9
clear-day9
clear-day9
clear-day9
clear-day9

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
—
Weather Adj.
—
Common Goals:

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

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!

Request / Submit Map

FAQ

Ask a Question about the Idaho Running Day Marathon

Racecast Concierge (free during beta)

Ask a question about the Idaho Running Day Marathon and we'll do the hard part and find the answer for you within 48 hours.

By using Racecast Concierge, you agree to receive email alerts pertaining to the Idaho Running Day Marathon and general racecast.io updates.

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.

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
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR