Boulderthon Boulder Marathon

The Boulderthon Boulder Marathon offers a scenic and challenging experience for runners, featuring a course that blends mountain views, rolling hills, and the picturesque landscapes of Boulder, Colorado. The event includes a full marathon, half marathon, 10K, and 5K, all of which are designed to showcase the natural beauty of the area. Runners will pass through Boulder’s iconic flatirons, enjoy gorgeous mountain views, and navigate along the Boulder Creek Path. With a supportive local crowd and a relaxed, laid-back atmosphere, it’s an event that blends athleticism with Boulder’s outdoor lifestyle.