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. Runners may experience natural challenges such as wildlife encounters, flooding, or construction, adding a unique outdoor atmosphere to the race.

Participants receive a finisher's award, swag from sponsors, and a coveted t-shirt or hoodie if registered by the deadline. The event emphasizes community spirit and the natural beauty of Boise’s riverfront trails. Visit the organization's website for the most recent information.