Race Discovery
City of Trees Marathon
City of Trees Marathon logo

City of Trees Marathon

Boise, Idaho, United States View on map
Oct 11, 2026 (America/Boise local time)
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. 

Pick your distance

Running

Marathon

Oct 11, 2026 Marathon 8:00 AM
$125.00
Open

Half Marathon

Oct 11, 2026 Half-Marathon 8:30 AM
$110.00
Open

10k

Oct 11, 2026 10K 9:00 AM
$75.00
Open

5k

Oct 11, 2026 5K 9:00 AM
$60.00
Open

Typical race-day weather

Based on 6 years of Open-Meteo archive data for this event's race dates in Boise, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 8.0° / Maximum temperature (race-week average) 20.6°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 5.8° / Maximum feels like — heat index / wind chill (race-week average) 20.6°
Peak wind (km/h)
Strongest wind of the day (race-week average)
17.5
Precip (mm)
Precipitation over the day (race-week average)
0.7mm
Humidity
Mean relative humidity (race-week average)
49.8%
Sunrise
Sunrise at the start line on October 11, 2026 (MDT)
Sunset
Sunset at the start line on October 11, 2026 (MDT)
Daylight
Hours between sunrise and sunset on race day
11h 13m

The sun rises at 7:54 AM and sets at 7:08 PM local time (MDT) in Boise on October 11, 2026 — 11h 13m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

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Results — City of Trees Marathon

2025 edition View Results
2024 edition View Results
2023 edition View Results
2022 edition View Results

Other races near Boise

Different organizers, within 40 miles, in the next three months

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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 55 Boise events

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