City of Trees Marathon

The City of Trees Marathon, scheduled for October 11, 2025, in Boise, Idaho, features a variety of running events including a full marathon, half marathon, 10k, and 5k. Participants can expect great swag, including a coveted t-shirt hoodie and finisher awards. The race courses utilize the scenic Boise Greenbelt, which may present challenges such as wildlife encounters and unpredictable river conditions.

Runners are encouraged to register early to ensure they receive their t-shirts, as availability is not guaranteed for those who register after October 2, 2025. Visit the organization's website for the most recent information.