City of Trees Marathon

📅 Race Date

Saturday, October 11, 2025
Check for Course Maps under the "Event Info" tab above in the menu.

🎽 Swag and T-Shirt Deadline

• Coveted Item: t-shirt hoodie shirt, swag thanks to our amazing sponsors, and finisher food/drink.
• Finisher's Award: all COT runners get a finisher's award.
• Registration Notice: 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 are created due to sidewalk construction, sinkholes, flooding, etc.

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

🔗 More Information

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