In 71 days · Sun, Oct 11, 2026
Don't let race day sneak up
One email during race week. That's it.
When
Sunday, October 11th, 2026
Where
1400 Bronco Ln, Boise ID
Distances
Marathon · Half · 10K · 5K
Typical weather
44–67°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
49–60°F
dry
2024
48–75°F
dry
2023
46–59°F
rain
2022
52–72°F
dry
2021
40–53°F
dry
2020
41–61°F
dry
2019
30–56°F
dry
2018
35–57°F
dry
2017
43–57°F
dry
2016
49–61°F
dry
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About this race
Event Details
- Date: Sunday, October 11, 2026
- Location: 1400 Bronco Ln, Boise, ID
- Course Maps: Course Maps will be updated once details have been finalized.
Participant Information
- Great Swag: Participant T-shirt and all COT runners get a finisher's award.
- T-Shirt Deadline: Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
Course Information
- Greenbelt System: Please note courses utilize the Boise Greenbelt system.
- River Conditions: Should we run the Greenbelt, the river can be unpredictable.
- Local Challenges: Systems and entities that govern the local Greenbelt are constantly dealing with challenges like sidewalk construction, sinkholes, and flooding.
- Wildlife Encounters: During the run, you may encounter wildlife that may cause a delay or a change in your planned route.
Additional Information
Or you may cause your own delay to stop and listen to the amazing sounds this course creates.
Registration Link
For more information and to register, visit the City of Trees Marathon website.
Course map
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