Fall - Mud Mountain Dam Marathon & Half Marathon

Get ready for a truly exhilarating and fast experience at the Fall - Mud Mountain Dam Marathon & Half Marathon in Enumclaw, WA, on September 19, 2026. This race is renowned for its incredibly swift, downhill, and scenic courses, making it a prime opportunity for personal bests and even Boston Marathon qualifying times. The marathon boasts a significant net elevation loss of approximately 1,200 feet, starting at the majestic Mud Mountain Dam and guiding runners through picturesque farmlands and lush forested areas, following the path of the Carbon River. The half marathon, beginning in the charming town of South Prairie, also offers a gradual, paved downhill journey along the scenic Foothills Rail Trail with a net elevation loss of 339 feet. Both races culminate in an exciting finish at the historic McMillin Bridge.

What truly sets this race apart is its "blazing fast" profile. The fully paved marathon course, with just a brief section of packed gravel, is USATF certified and notably not subject to the new Boston Marathon qualifying time adjustments for downhill courses, as its drop is less than the 1,500-foot threshold. Runners can anticipate consistently spaced aid stations approximately every two miles, well-stocked with water, Nuun electrolyte, Vaseline, and Porta-Potties, with select stations also offering energy gels. Medical personnel will be available on the course and at the finish, ensuring runner safety.

Participants consistently praise the beautiful scenery and the enjoyable, fast nature of the course. Typical race day conditions in mid-September feature pleasant highs around 69°F and lows of 50°F, with a roughly 21% chance of precipitation, offering ideal running weather. Cross the finish line, collect your high-quality finisher medal, and enjoy the celebratory food and beverages as you reflect on your "dam" good run.