He actually rode through “all 50 states”. Not only that, but I’m pretty sure he didn’t plan his route for shortness. 
It might be a record for Australia. But worldwide, Gracie Sorbello was a tough act to follow. Not only did she ride across the USA in 2006, barefoot, she later did a Muni ride of the Continental Divide, which is a very not-flat route! The unicycles from each of those rides now hang in the National Bicycle Hall of Fame in Davis, CA.