Manhattan has been circumnavigable since June 17, 1895, when the Harlem Ship Canal opened and connected the Harlem River to the Hudson. 28.5 miles around one of the most iconic islands on Earth — through three rivers, past 20 bridges, and across Hell Gate's 5-knot currents.

Three propulsion classes claim this route. Human-powered records run deepest — the 20 Bridges Swim is a Triple Crown event with over a century of history. Sail and Powersport classes are wide open, waiting for someone to set the standard.