Run Boulderthon: The Boulder Marathon

Run Boulderthon: The Boulder Marathon is a premier fall marathon event held in Boulder, Colorado, nestled in the scenic foothills of the Rocky Mountains. Recognized as one of the top marathons in the U.S., it features a stunning course that begins at Boulder Reservoir, runs along the iconic Flatirons, and finishes with an epic downtown finish on Pearl Street Mall. The event offers multiple race distances, including a marathon, half marathon, 10K, 5K, and kids' runs, attracting thousands of runners nationwide and internationally.

Known for its vibrant atmosphere, excellent organization, and beautiful views, Boulderthon also hosts a lively after-party, making it a celebrated race experience. Visit the organization's website for the most recent information.