City of Trees Marathon
Sunday, October 11, 2026
Boise, Idaho
The Experience
Sunday, October 11, 2026
Course Maps will be updated once details have been finalized.
GREAT SWAG and T-SHIRT DEADLINE
Comfiest long sleeve t-shirt, swag thanks to our amazing sponsors, and finisher food/drink, all COT runners get a finisher's award. Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
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. During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route. Or you may cause your own delay to stop and listen to the amazing sounds this course creates.
Race Details
Race Day
Sunday, October 11, 2026 · 10/11/2026 08:30
Start Location
733 S Pioneer Street, Boise, ID 83702
Course
Loop
Also Offers
Giveaway
T-Shirt
Registration
Register online — $55
Race Website
Official race information
Race Performance
2:16:34
10:25/mi pace
1:16:38
5:51/mi pace
715
61% female · 40% male
26 states
Avg age: 35
Finish Time Distribution (2025)
1:58:11
Top 25%
2:38:03
Top 75%
Historical Weather
☀
Avg High
69°F
☽
Avg Low
47°F
☂
Precip
0.03 in
🍃
Wind
11.4 mph
More races in Idaho
The Experience
Sunday, October 11, 2026
Course Maps will be updated once details have been finalized.
GREAT SWAG and T-SHIRT DEADLINE
Comfiest long sleeve t-shirt, swag thanks to our amazing sponsors, and finisher food/drink, all COT runners get a finisher's award. Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
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. During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route. Or you may cause your own delay to stop and listen to the amazing sounds this course creates.
Race Details
Race Day
Sunday, October 11, 2026 · 10/11/2026 08:30
Start Location
733 S Pioneer Street, Boise, ID 83702
Course
Loop
Also Offers
Giveaway
T-Shirt
Registration
Register online — $55
Race Website
Official race information
Race Performance
2:16:34
10:25/mi pace
1:16:38
5:51/mi pace
715
61% female · 40% male
26 states
Avg age: 35
Finish Time Distribution (2025)
1:58:11
Top 25%
2:38:03
Top 75%