Full Distance Triathlon Kalmar, Sweden: Ultimate Guide. The Kalmar Triathlon swim segment offers a single-loop 3.8 km (2.4-mile) course in the Kalmar Strait, with athletes navigating through the cool Baltic Sea waters averaging 68°F (20°C). Participants are cheered on by enthusiastic crowds lining the shoreline. The 180.2 km (112-mile) one-loop course returns to Kalmar via the iconic Öland Bridge, usually closed to bicycles. This challenging yet breathtaking bike course sets the Kalmar ...