City of Trees Marathon

Race Date

Saturday, October 10, 2026

Course Maps

Course Maps will be updated once details have been finalized.

Swag and T-Shirt Deadline

• Comfy T-Shirt: Comfiest long sleeve t-shirt, swag thanks to our amazing sponsors, and finisher food/drink.
• Finisher's Award: All COT runners get a finisher's award.
• Registration Note: Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.

Course Information

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.

• Wildlife Encounters: During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route.
• Natural Sounds: Or you may cause your own delay to stop and listen to the amazing sounds this course creates.

Location and Registration

Join us at 733 S Pioneer Street, Boise, ID. For more information and registration, visit City of Trees Marathon.