City of Trees Marathon

The City of Trees Marathon, held in Boise, Idaho, offers a variety of race distances including a full marathon, half marathon, 10k, and 5k. The event takes place on October 11, 2025, and features courses that utilize the scenic Boise Greenbelt system along the river. Participants should be prepared for potential natural challenges such as wildlife encounters, flooding, or construction that may affect the route.

All runners receive a finisher's award, with swag including coveted t-shirts and hoodies provided by sponsors. The race emphasizes a community atmosphere with support from local businesses and a focus on the unique outdoor environment of Boise. Visit the organization's website for the most recent information.