Idaho Running Day

Boise, ID, USA · October 17, 2026

46°·65° high·Breezy·Dry

Weather

Race Day Weather

46°at start

66° high

Breezy

Dry

Cool start, warming trend ahead

Runners will face a temperature rise from 47°F at the start, peaking at 66°F. Wind will be light at 11 mph from the SW, with gusts reaching 23 mph. With humidity at 47%, hydration is essential; runners should pace conservatively as temperatures climb.

Race day forecast available in 23 days

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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

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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 67°F and a low of 44°F with a 6% chance of rain.

Historical Weather

Based on 3 years of data

Avg Temp

81°F

L:53° H:81°

RunScore

Conditions

Rain Freq

0 of 3 yrs

Wind3mph

Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Idaho Running Day Clear conditions throughout the day. 2025	38°/60°	-	32°
2024 Idaho Running Day Clear conditions throughout the day. 2024	64°/93°	-	38°
2023 Idaho Running Day Clear conditions throughout the day. 2023	57°/89°	-	39°

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