Half Distance Triathlon Sandusky Ohio - Event Overview Swim Course (1.2 miles): The swim portion takes place in the scenic, protected waters of Sandusky Bay, with a unique rolling start. Athletes will jump feet-first from the Kelleys Island Ferry (The Carlee Emily) into the bay, where the average water temperature is around 78°F (26°C). The swim finishes at Paper District Marina, just a 150-yard walk from the transition area, making it a quick start for the bike course. Bike Course (56 ...