Boulder Rez Marathon

The Boulder Rez Marathon is a scenic running event held at the Boulder Reservoir in Boulder, Colorado. Scheduled for August 2, 2025, the marathon features a flat course primarily on dirt roads and trails, offering stunning views of the reservoir and the Rocky Mountains. Participants can choose from various distances, including a 10K, half marathon, 3/4 marathon, and full marathon, with pricing varying based on registration dates.

The event is USATF sanctioned and includes features such as early packet pick-up, participant shirts, finisher medals, and awards for top finishers in various age groups. Volunteers are also welcomed to assist during the event. Visit the organization's website for the most recent information.