City of Trees Marathon
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City of Trees Marathon - Boise, ID
The City of Trees Marathon is scheduled for Sunday, October 11, 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 updated once details are finalized.
The event program includes multiple distances:
- Marathon
- Half Marathon
- 10k
- 5k
- Virtual any distance
Registered participants receive a long sleeve t-shirt while supplies last, swag from sponsors, finisher food and drink, and a finisher's award. Registrants who register after October 1, 2026 are not guaranteed a shirt.
Courses utilize the Boise Greenbelt system. If the Greenbelt is used, conditions along the river can be unpredictable. Local issues such as sidewalk construction, sinkholes, or flooding may affect the course. Participants may also encounter wildlife that could delay progress or require a change to the planned route. These factors may lead to updates to the course maps and routing information prior to the event. Visit the organization's website for the most recent information.
