Boulderthon - Boulder Marathon

The event is a marathon held in Boulder, Colorado, typically scheduled for late September. The course starts by traversing back roads near the foothills of the Flatirons mountain range, then continues into Downtown Boulder, finishing on the pedestrian Pearl Street Mall. The route is described as a loop, run entirely on paved roads.\n\nThe course profile is classified as hilly, which indicates that participants can expect notable elevation changes throughout the race, potentially adding to its ph