City of Trees Marathon
City of Trees Marathon gives Boise a fall full marathon with Greenbelt miles, river scenery, neighborhood support, and a broad slate of shorter races.
Quick facts
- Boise River Greenbelt setting.
- Full marathon with half marathon, 10K, and 5K options.
- Mostly flat river-corridor running.
About the City of Trees Marathon
This established Boise race weekend uses the city's river corridor for its full marathon and companion distances. It is a convenient regional option with familiar RunSignup logistics.
Course
The course draws heavily on the Boise River Greenbelt and nearby roads, producing a generally flat path-and-road feel. Shared-use sections and turns reward awareness more than hill strength.
Race-day weather
Boise in October is commonly cool and dry at the start, then warmer under high-desert sun. Open Greenbelt sections may pick up wind.
Past City of Trees Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, October 11, 2026 | Results available | Open results |
| 2025 | Saturday, October 11, 2025 | Results available | Open results |
| 2024 | — | Results available | Open results |
Your race experience
Ran the 2026 City of Trees Marathon?
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City of Trees Marathon FAQ
When is the City of Trees Marathon?
We're waiting for the finalized date for the 2027 City of Trees Marathon. The most recent running was on Sunday, October 11, 2026.
Is City of Trees Marathon a Boston qualifier?
Yes. City of Trees Marathon is a Boston Marathon qualifier. To use the result, you must run the certified full-marathon course within the qualifying window and meet the current standard for your age and gender. Meeting the standard lets you apply but does not guarantee entry, and net-downhill courses can receive a time adjustment under current B.A.A. rules. Review the Boston qualifying times and downhill-course rules, or browse upcoming Boston qualifier marathons.
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