The World’s First “Last Person Swimrunning” – An UltraSwimrun Adventure in the Stockholm Archipelago Backyard

You’ve probably heard about the backyard ultra-concept, an idea coming from Laz, the founder of the now legendary Barkley Marathons. The last person standing A Backyard Ultra (BU) is a race where challengers run the distance of 6706 meters (4.167 miles) in a loop and within 1 hour. Every full hour a new loop starts, and the challenge continues until there is only 1 person left standing and alone finishing …