Full Distance Triathlon in Kalmar, Sweden: A Thrilling Race Through Baltic Beauty and Historic Cityscapes The triathlon kicks off with a one-loop, 3.8 km (2.4-mile) swim in the Kalmar Strait. Athletes plunge into the refreshing waters of the Baltic Sea, where average temperatures hover at 68°F (20°C). The course hugs the shoreline, allowing competitors to feel the energy of excited crowds. The 180.2 km (112-mile) bike course takes competitors on a scenic ride over the island of Öland, ...