City of Trees Marathon
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City of Trees Marathon - Boise, ID
The City of Trees Marathon takes place on Saturday, October 10, 2026, in Boise, Idaho. The event is organized by City of Trees Marathon and is based at 733 S Pioneer Street, Boise, ID 83702, US. Course maps will be published once details are finalized. The event includes multiple race distances and awards a finisher's award to participants. Registered runners receive a long sleeve t-shirt and sponsor-provided swag; registrants who register after October 1, 2026 are not guaranteed a shirt.
Race details
The event includes these distances:
- Marathon
- Half Marathon
- 10k
- 5k
Published entry fees are: Marathon $65, Half Marathon $45, 10k $45, and 5k $35. The courses use the Boise Greenbelt system. Organizers note the river and Greenbelt can be unpredictable and that course conditions may be affected by sidewalk construction, sinkholes, flooding, or wildlife. Finisher food and drink are provided. Visit the organization's website for the most recent information.
