About

SISU Backyard Ultra at Lake Rebecca is a test of grit and resilience wrapped in a welcoming, community-driven atmosphere. Built around the Finnish idea of sisu, the event challenges runners to keep returning to the course hour after hour, making it as much a mental battle as a physical one. The format creates a unique rhythm of effort and recovery, with time between loops to regroup, refuel, and soak in the distinctive experience, including the event’s sauna-and-swim touch. The course features a varied loop of gravel, asphalt, and trail, offering a scenic mix that changes character through the day and into the night. Whether runners are aiming for 50K, 50 miles, 100 miles, or simply seeing how far their determination can carry them, the challenge is designed to be tough, memorable, and deeply personal.