In 64 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
- Website: City of Trees Marathon
- Course Maps: Course Maps will be updated once details have been finalized.
Participant Information
- SWAG: GREAT SWAG and T-SHIRT DEADLINE
- Shirt Guarantee: Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
- Finisher's Award: All COT runners get a finisher's award.
- Wildlife: During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route.
Course Information
- Greenbelt System: Please note courses utilize the Boise Greenbelt system.
- River Conditions: The river can be unpredictable.
- Local Challenges: Systems and entities that govern the local Greenbelt are constantly dealing with challenges such as sidewalk construction, sinkholes, flooding, etc.
- Sounds of Nature: You may cause your own delay to stop and listen to the amazing sounds this course creates.
Course map
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