Runners will face a starting temperature of 52°F, rising to 77°F by the finish. Winds will be from the SE at 15 mph, with gusts up to 18 mph. With low humidity at 29%, hydration will be important, and runners should plan to adjust their pace as temperatures rise.

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Distance: 26.2mi

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Race Info

Idaho Running Day is a multi-distance running event in Boise, Idaho, held each fall along the Boise Greenbelt. It offers a marathon, half marathon, 10K, and 5K, starting near Lucky Peak Reservoir at Sandy Point Park and finishing in southeast Boise along the Boise River. The event was previously known as the Idaho Running Company Marathon before being rebranded as Idaho Running Day in 2025. Source

Website

Race weekend

Saturday, October 17

8:00 AMMarathon (26.2 mi)

Half Marathon (13.1 mi)

10K (6.2 mi)

5K (3.1 mi)

Course Map

FAQ

When is the 2026 Idaho Running Day?

The 2026 Idaho Running Day will be held on Saturday October 17, 2026.

Is the Idaho Running Day a Boston Marathon Qualifier?

Yes, the Idaho Running Day is an official Boston Marathon qualifier.

What is the time limit for the Idaho Running Day?

The time limit for the Idaho Running Day is 7 hours.

What will the weather be like for the 2026 Idaho Running Day?

The forecast calls for a high of 77°F and a low of 52°F with a 0% chance of rain.

Historical Weather

Based on 4 years of data

Avg Temp

61°F

L:53° H:70°

RunScore

Conditions

Rain Freq

0 of 4 yrs

Wind5mph

Dew35°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Idaho Running Day Clear conditions throughout the day. 2026	53°/65°	-	29°
2025 Idaho Running Day Clear conditions throughout the day. 2025	38°/51°	-	33°
2024 Idaho Running Day Clear conditions throughout the day. 2024	64°/84°	-	38°
2023 Idaho Running Day Clear conditions throughout the day. 2023	57°/79°	-	40°

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