Half Distance Michigan Triathlon: Swim, Bike, and Run Overview Swim (1.2 Miles): The swim begins and ends near the transition area on Betsie Bay, offering athletes calm and protected waters. This one-loop course is ideal for consistent conditions, with an average water temperature of 65°F (18°C), making for a refreshing start on race day. Bike (56 Miles): The scenic bike course follows Highway M-22 and surrounding Benzie County roads. Featuring two out-and-back sections, the terrain is a mix ...