City of Trees Marathon
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City of Trees Marathon - Boise, October 11, 2026
The City of Trees Marathon takes place in Boise on October 11, 2026, with the event base at 1400 Bronco Ln, Boise, ID 83706, United States. Course maps will be updated once details are finalized.
The event includes multiple distance options:
- Marathon
- Half Marathon
- 10k
- 5k
- SoleKIDs 5K
- Virtual any distance
Courses use the Boise Greenbelt system. The river and the Greenbelt can be unpredictable; typical issues include sidewalk construction, sinkholes, and flooding. Participants may encounter wildlife, which could delay progress or require a route change.
Participant information provided by the organizer notes that registrants receive a participant t-shirt and all City of Trees runners receive a finisher's award. Registrants who sign up after October 1, 2026 are not guaranteed a shirt.
Published entry fees and deadlines in the event information are: Marathon $105, Half Marathon $95, 10k $65, 5k $55, Virtual $45. Prices for the listed road events increase after August 31, 2026 at 11:59pm MDT. Virtual registration ends October 5, 2026 at 12:00pm MDT. Visit the organization's website for the most recent information.
