Teton Dam Marathon

The Teton Dam Marathon, scheduled for June 6, 2026, in Rexburg, Idaho, offers a unique and meaningful race experience for runners of all levels. This event isn't just a race; it's a commemoration of community resilience, held annually around the anniversary of the Teton Dam collapse, honoring the spirit of overcoming significant challenges. Participants can choose from a full marathon (26.2M), half marathon (13.1M), 10K, 5K, or a marathon relay, ensuring a distance for every athlete.

The marathon course is a scenic point-to-point journey beginning at the historic Teton Dam Site at an elevation of 5380 feet. Runners will appreciate the initial gentle descent, shedding approximately 500 feet over the first 15 miles, before a moderate 3-mile climb regains about 360 feet. The final miles offer a rewarding downhill stretch into Rexburg, culminating at Smith Park with a net elevation loss of roughly 530 feet. The route itself is celebrated for its beautiful open spaces, rural Idaho scenery, and views through canyons, with some sections traversing dirt roads through farm areas. Aid stations are well-supported and plentiful, providing water, sports drinks, gels, and various snacks to keep runners fueled. Finish line festivities at Smith Park include medals, abundant snacks, and even massage therapists, creating a celebratory atmosphere.

Typical race day conditions in early June boast pleasant temperatures, with highs around 72°F and lows around 45°F, and only a 9% chance of precipitation. Runners consistently praise the Teton Dam Marathon for its excellent organization, dedicated volunteers, and the overall enjoyable race day experience. Whether you're chasing a personal best on its net downhill profile or simply soaking in the picturesque Idaho countryside, this race offers a compelling blend of natural beauty and heartfelt history.