Duff Dog Backyard Ultra

The Duff Dog Backyard Ultra is an endurance running event held at Blue Mounds State Park near Luverne, Minnesota. The race features a runner-friendly loop course primarily composed of grass trails, with some gravel and a short paved section, covering a distance of 4 miles 880 feet (6.7 km) per loop. Participants run one loop every hour, starting precisely on the hour, continuing until only one runner remains.

The event offers shaded runner support areas and nearby camping for spectators. The course follows strict Backyard Ultra rules, emphasizing continuous hourly loops without artificial aids, making it a challenging test of endurance and strategy. Visit the organization's website for the most recent information.