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Trosa Ultra Backyard

Course record: 38 yards (Richard Andersson 2018).

Trosa Ultra Backyard (TUB) is a full Backyard Ultra event held annually in the picturesque town of Trosa, Sweden . Following the official Big Dog’s Backyard Ultra format, runners complete a 6.7056 km (4 miles 880 feet) loop each hour, on the hour. The race continues without a predetermined finish line until only one runner remains who can complete a loop alone, making it a true test of endurance, strategy, and mental strength. The course blends gravel, asphalt and trail surfaces , offering a varied and scenic experience for all participants. With a strong local running community and an enthusi…

Past editions