City of Trees Marathon

📅 Event Date

Saturday, October 11, 2025

Check for Course Maps under the "Event Info" tab above in the menu.

🎽 Swag and T-Shirt Deadline

• Great Swag: Coveted t-shirt hoodie shirt, swag thanks to our amazing sponsors, and finisher food/drink.
• Finisher Award: All COT runners get a finisher's award.
• T-Shirt Deadline: Please note that registrants registering after October 2, 2025 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: 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.
• Enjoy the Sounds: Or you may cause your own delay to stop and listen to the amazing sounds this course creates.

🔗 More Information

For more details, please visit the official race page: City of Trees Marathon.