Half Distance Triathlon Cartagena: Race Overview, Swim Course – 1.2 Miles (1.9 km) Athletes dive into the protected waters of Bahía de las Ánimas, enjoying calm Caribbean conditions with water temperatures around 80°F (28°C). Spectators can watch from the Convention Center, boardwalks, and city walls, creating an energetic atmosphere. Bike Course – 56 Miles (90 km) The fast and mostly flat bike course starts from the Cartagena Convention Center, passing through the historic Clock Tower and ...