City of Trees Marathon
Always double-check with the organizer's website! This page may contain affiliate links.
About the race
City of Trees Marathon in Boise, Idaho offers four race distances—Marathon, Half Marathon, 10K, and 5K—held along the Boise Greenbelt system by the Boise River. The course may vary due to river conditions and Greenbelt governance, and runners should be prepared for possible wildlife encounters and route changes. The event emphasizes strong swag, including a coveted finisher hoodie shirt and other sponsor gifts, plus finisher food and drink; shirt availability is tied to registration deadlines.
The race takes place on Saturday, October 11, 2025, with multiple events and corresponding pricing progressions noted on the organizer’s site. Visit the organization's website for the most recent information.