Full Distance Triathlon Copenhagen, Denmark: An Iconic Race with Spectacular Scenery and Local Support. The race begins with a 3.8 km (2.4 mile) single-loop swim in the calm, spectator-friendly waters of Amager Strandpark’s artificial lagoon. This sheltered setting offers smooth conditions that contribute to fast swim times, with an average water temperature of 65°F (18°C). The 180 km (112 mile) two-loop bike route offers a unique experience, combining Copenhagen’s vibrant city center, ...