City of Trees Marathon
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City of Trees Marathon : Boise, ID
The City of Trees Marathon takes place on October 10, 2026, in Boise, Idaho. The event is organized by City of Trees Marathon and uses a location address of 733 S Pioneer Street, Boise, ID 83702. Course maps will be updated once details are finalized. The event notes that courses utilize the Boise Greenbelt system and that the river and Greenbelt conditions can be unpredictable.
Distances and entry
- Marathon
- Half Marathon
- 10k
- 5k
Listed entry prices are $65 for the Marathon, $45 for the Half Marathon and 10k, and $35 for the 5k. Prices increase after April 30, 2026.
Course and participant information
Runners will receive a long sleeve t-shirt, sponsor swag, finisher food and drink, and a finisher's award. Registrants who register after October 1, 2026 are not guaranteed a shirt. The Greenbelt course may be affected by sidewalk construction, sinkholes, flooding, or other local maintenance, and wildlife encounters are possible; these factors can cause delays or route changes. Visit the organization's website for the most recent information.
