City of Trees Marathon

Boise, ID, USA · October 11, 2026

50°·57° high·Breezy·Dry

Weather

Race Day Weather

50°at start

60° high

Windy

Dry

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Cool start, steady winds

Runners will face a temperature increase from 50°F at the start to 60°F by finish. Wind will be a steady NW at 17 mph, which may affect pacing. With humidity at 42% and a dew point of 30°F, conditions will be comfortable, but runners should remain aware of the wind and adjust their efforts accordingly.

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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.

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Race weekend

Sunday, October 11

8:00 AMMarathon (26.2 mi)

8:30 AMHalf Marathon (13.1 mi)

9:00 AM10K (6.2 mi)

9:00 AM5K (3.1 mi)

Course Map

FAQ

When is the 2026 City of Trees Marathon?

The 2026 City of Trees Marathon will be held on Sunday October 11, 2026.

Is the City of Trees Marathon a Boston Marathon Qualifier?

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

What is the time limit for the City of Trees Marathon?

The time limit for the City of Trees Marathon is 6 hours.

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

The forecast calls for a high of 61°F and a low of 49°F with a 10% chance of rain.

Historical Weather

Based on 4 years of data

Avg Temp

55°F

L:49° H:62°

RunScore

Conditions

Rain Freq

0 of 4 yrs

Wind7mph

Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 City of Trees Marathon Clear conditions throughout the day. 2025	46°/54°	-	36°
2024 City of Trees Marathon Clear conditions throughout the day. 2024	51°/67°	-	36°
2023 City of Trees Marathon Partly cloudy throughout the day. 2023	53°/64°	-	40°
2022 City of Trees Marathon Clear conditions throughout the day. 2022	47°/65°	-	24°

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