Run Boulderthon: The Boulder Marathon

Run Boulderthon: The Boulder Marathon is a premier running event held in Boulder, Colorado, known for its stunning course set against the backdrop of the Rocky Mountains. Recognized as one of the top marathons in the U.S., it features a variety of races including a marathon, half marathon, 10K, and 5K, attracting thousands of participants from across the globe. The event is celebrated for its scenic views, well-organized logistics, and vibrant community atmosphere, culminating in a festive downtown finish and after-party.

Boulderthon is a Boston Marathon Qualifying event, ensuring a high standard of race experience for all runners. Visit the organization's website for the most recent information.