When does the City of Trees Marathon sell out?

City of Trees Marathon hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

Marathon

Road

City of Trees Marathon

Q: How hard is the City of Trees Marathon Marathon?

City of Trees Marathon is a Marathon on a road course in Boise, Idaho. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the City of Trees Marathon?

Race-day weather in Boise can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 8:00 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

October 10, 2026

Boise, Idaho

Rolling Course

Decision scores

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We're still profiling this race — fit signals coming soon.

About the Race

Saturday, October 10, 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...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

road

Surface

Road

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Vibe & community

scenic

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

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Common questions

How hard is the City of Trees Marathon Marathon?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.