City of Trees Marathon
Sun, Oct 11, 2026, 4:00 AM MDT
- Type
- Run
Finish signup on the organizer site (check fees and dates there).
Race feel
Run the Boise Greenbelt Marathon, where scenic river views meet potential wildlife encounters and amazing sounds.
- Scenic
- Quirky
Scenic
QuirkyThe City of Trees Marathon invites runners to experience a full 26.2 miles along Boise's scenic Greenbelt system. Prepare for a course that may feature unpredictable river conditions and potential wildlife encounters, offering a truly unique natural backdrop. Participants receive a comfortable long-sleeve t-shirt, quality swag from sponsors, and a finisher's award, along with post-race food and drink.
What to expect
- Run along the dynamic Boise Greenbelt, with potential for river fluctuations and wildlife sightings.
- Receive a comfortable long-sleeve t-shirt, sponsor swag, a finisher's award, and post-race food and drink.
Standout details
- Boise Greenbelt course
From the organizer
Sunday, October 11, 2026 Course Maps will be updated once details have been finalized.
GREAT SWAG and T-SHIRT DEADLINE Comfiest long sleeve t-shirt, swag thanks to our amazing sponsors, and finisher food/drink, all COT runners get a finisher's award. Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
Please note courses utilize the Boise Greenbelt system. Should we run the Greenbelt, the river can be unpredictable. Systems and entities that govern the local Greenbelt are constantly dealing with these challenges. Typical issues are created due to sidewalk construction, sinkholes, flooding, etc. During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route. Or you may cause your own delay to stop and listen to the amazing sounds this course creates.
Shirt