City of Trees Marathon

Boise, ID, USA · October 10, 2026
partly-cloudy-day49°·63° high·Breezy·Dry
9
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Race Day Weather

partly-cloudy-day
49°at start
66° high
Breezy
Dry

Cool start — fast day potential, big temp swing

A cool 49°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 66°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 135 days
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Pace Calculator

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.

Area Map

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
8
Conditions
Rain Freq
0%
0 of 2 yrs
Wind9mph
Dew38°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-night
46°/58°-
8
2024
clear-night
51°/73°-
9