City of Trees Half Marathon
Boise, ID, USA · October 10, 2027·
City of Trees Half Marathon race day weather
49°at start
66° high
Breezy
Dry
Your goal
0:00:00
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 319 days
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Distance: 13.1mi
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About the City of Trees Half Marathon
The City of Trees Half Marathon covers 13.1 miles on the Boise Greenbelt, the pathway system that follows the Boise River through the city. It is run on the Sunday of race weekend, with the marathon starting at the same time.
Race weekend
Sunday, October 10
8:00 AMMarathon (26.2 mi)8:00 AMHalf Marathon (13.1 mi)
8:30 AM10K (6.2 mi)8:30 AM5K (3.1 mi)
City of Trees Half Marathon FAQ
When is the 2027 City of Trees Half Marathon?
The 2027 City of Trees Half Marathon will be held on Sunday October 10, 2027.
What is the time limit for the City of Trees Half Marathon?
The time limit for the City of Trees Half Marathon is 6 hours.
What will the weather be like for the 2027 City of Trees Half Marathon?
The forecast calls for a high of 71°F and a low of 47°F with a 2% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.
What is the weather usually like for the City of Trees Half Marathon?
Over the 5 years racecast.io has race-day weather for (2022 to 2026), it averaged 49°F at the start and 53°F by a typical finish. It has not rained during race hours in any of those years.
What was the hottest City of Trees Half Marathon?
Of the 5 years on record, 2024 was the warmest, reaching 57°F during race hours. The coldest start was 2026, at 45°F.
What was the windiest City of Trees Half Marathon?
Of the 5 years on record, 2026 was the windiest, with wind averaging 12 mph during race hours. The calmest was 2024, at 4 mph.
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