Sisu Backyard Ultra at Lake Rebecca
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Sisu Backyard Ultra at Lake Rebecca
The Sisu Backyard Ultra at Lake Rebecca is scheduled for September 4, 2027, in Rockford, MN. Registration opens on September 19, 2026. The event uses the backyard ultra format: runners must complete a 4.167-mile loop every hour and be ready to start the next loop when the hour begins. If a runner does not finish a loop in time or cannot start the next loop, that runner is out of the race. There is no predetermined finish line.
The loop at Lake Rebecca combines gravel, asphalt, and trail surfaces, and runners complete the same loop repeatedly as hours and miles add up. A central corral serves as the event hub: a shared runner tent is located steps from the start, and food and refreshments are available nearby. Volunteers and crews support runners around the corral throughout the event.
The race includes a livestream so people who are not on site can follow hourly starts, runners returning to the finish, and footage from the course. Amenities mentioned for participants include a sauna and an option for a post-run swim. The event emphasizes repeated hourly starts, crew access near the corral, and the simple but demanding format of running one loop at a time. Visit the organization's website for the most recent information.
