In 57 days · Sun, Oct 11, 2026
Don't let race day sneak up
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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
Best months to race in Idaho →
About this race
Race Date
Sunday, October 11, 2026
Course Information
- Course Maps: Course Maps will be updated once details have been finalized.
- Boise Greenbelt: Please note courses utilize the Boise Greenbelt system.
- Environmental Factors: The river can be unpredictable: challenges include sidewalk construction, sinkholes, flooding, etc.
- Wildlife Encounters: You may encounter wildlife that may cause a delay in your progress and/or change in your planned route.
Participant Amenities
- Swag and T-shirt Deadline: GREAT SWAG and T-SHIRT DEADLINE.
- Finisher's Award: All COT runners get a finisher's award.
- Shirt Guarantee: Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
Event Location
1400 Bronco Ln, Boise, ID
More Information
For additional details, visit the official race page: City of Trees Marathon.
Course map
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