Race Discovery
City of Trees Marathon
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City of Trees Marathon

Boise, Idaho, United States
Oct 11, 2026
Running

About this race

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. 

Join fellow runners on October 11, 2026 for the City of Trees Marathon. It's a fantastic Marathon, Half-Marathon, 10K, 5K featuring a flat and fast course in Boise.

Pick your distance

Running

Marathon

Oct 11, 2026 Marathon 8:00 AM
$85.00
Open

Half Marathon

Oct 11, 2026 Half-Marathon 8:30 AM
$75.00
Open

10k

Oct 11, 2026 10K 9:00 AM
$55.00
Open

5k

Oct 11, 2026 5K 9:00 AM
$45.00
Open

Weather Overview

These values represent the 4-year monthly averages for October in Boise.

Temp (°C)
Minimum temperature (monthly average) 7.8° / Maximum temperature (monthly average) 18.2°
Feels Like (°C)
Minimum feels like (with wind chill; monthly average) 5.0° / Maximum feels like (with wind chill; monthly average) 18.2°
Wind (km/h)
Average wind speed (monthly average)
16.4
Precipitation (mm)
Average precipitation (monthly average)
1.1mm

About Boise

City of Trees Marathon takes place in Boise, Idaho, United States. The local timezone is America/Boise.

View on Google Maps

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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.

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