City of Trees Marathon
- Date Sat 3rd October 2026 - Sun 11th October 2026
- Time 8:00AM MDT
- Location Boise, Idaho
- Price $22.20 - $133.50
- Races 6 races
- Distances Marathon, Half Marathon, 10km, 5km
Event summary
Get ready for an unforgettable experience at the City of Trees Marathon, taking place in the beautiful city of Boise, Ada, from October 3rd to October 11th, 2026. This exciting event features a variety of race distances, allowing runners of all abilities to participate and enjoy the stunning scenery of the Boise Greenbelt system.
On Sunday, October 11, participants will navigate the picturesque course, where they may encounter local wildlife and the natural beauty that surrounds them. With the vibrant fall colors and the crisp autumn air, this marathon promises an exhilarating atmosphere. All runners will receive a stylish participant T-shirt and a special finisher's award, but be sure to register by October 1, 2026, to guarantee your shirt! Whether you're a seasoned marathoner or a first-time runner, the City of Trees Marathon is the perfect event to challenge yourself and celebrate the spirit of running in a stunning outdoor setting.
On Sunday, October 11, participants will navigate the picturesque course, where they may encounter local wildlife and the natural beauty that surrounds them. With the vibrant fall colors and the crisp autumn air, this marathon promises an exhilarating atmosphere. All runners will receive a stylish participant T-shirt and a special finisher's award, but be sure to register by October 1, 2026, to guarantee your shirt! Whether you're a seasoned marathoner or a first-time runner, the City of Trees Marathon is the perfect event to challenge yourself and celebrate the spirit of running in a stunning outdoor setting.
Organiser's Description
SUNDAY, OCTOBER 11, 2026
Course Maps will be updated once details have been finalized.
GREAT SWAG AND T-SHIRT DEADLINE
Participant T-shirt and 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.
Course Maps will be updated once details have been finalized.
GREAT SWAG AND T-SHIRT DEADLINE
Participant T-shirt and 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.
Races
-
Marathon
Incl. $8.50 Fee & T-Shirt
Sun 11th October 2026 (8:00AM MDT)
$133.50
CLOSED -
Half Marathon
Incl. $7.60 Fee & T-Shirt
Sun 11th October 2026 (8:00AM MDT)
$117.60
CLOSED -
10k
Incl. $5.50 Fee & T-Shirt
Sun 11th October 2026 (8:30AM MDT)
$80.50
CLOSED -
5k
Incl. $4.60 Fee & T-Shirt
Sun 11th October 2026 (8:30AM MDT)
$64.60
CLOSED -
Virtual - Any Distance!
Incl. $3.70 Fee & T-Shirt
$48.70
CLOSEDProof of completion not required, but encouraged : ) -
SoleKIDs 5K
Incl. $2.20 Fee
Sun 11th October 2026 (9:00AM MDT)
$22.20
CLOSED
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1400 Bronco Ln, Boise, 83706, ID, United States
City of Trees Marathon
