City of Trees Marathon

Boise, ID, USA · October 10, 2026

49°·63° high·Breezy·Dry

Weather

Race Day Weather

49°at start

66° high

Breezy

Dry

Cool morning, manageable conditions

Runners will face a temperature range from 49°F at the start to a comfortable 64°F by the finish. With a light wind at 9 mph from the SE and humidity at 45%, conditions are favorable. Pacing can remain steady throughout, but runners should stay aware of potential gusts up to 19 mph.

Race day forecast available in 102 days

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Distance: 26.2mi

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Race Info

The City of Trees Marathon in Boise, Idaho, offers runners a scenic journey through the city's lush parks, tree-lined streets, and along the picturesque Boise River. The course features a mostly flat terrain with subtle elevation changes, providing a comfortable yet engaging running experience. Participants can expect well-marked paths, frequent aid stations, and a vibrant community atmosphere that showcases Boise's natural beauty and welcoming spirit.

Website

Course Map

FAQ

When is the 2026 City of Trees Marathon?

The 2026 City of Trees Marathon will be held on Saturday October 10, 2026.

Is the City of Trees Marathon a Boston Marathon Qualifier?

No, the City of Trees Marathon is NOT a Boston Marathon qualifier.

What will the weather be like for the 2026 City of Trees Marathon?

The forecast calls for a high of 71°F and a low of 47°F with a 3% chance of rain.

Historical Weather

Based on 2 years of data

Avg Temp

65°F

L:49° H:65°

RunScore

Conditions

Rain Freq

0 of 2 yrs

Wind9mph

Dew38°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Conditions	Low / High	Rain	Dew Point	Score	Results
2025 City of Trees Marathon Clear conditions throughout the day. 2025		46°/58°	-	35°
2024 City of Trees Marathon Clear conditions throughout the day. 2024		51°/73°	-	37°

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