Full Distance Triathlon Cairns: Race Details Swim (3.8 km): Start at Palm Cove with a 2-lap swim beginning off Williams Esplanade and exiting further north. The course, adjusted closer to shore for smoother conditions, features a self-seeded rolling start divided into four zones based on swim time. Average water temperature is 73°F (23°C). Bike (180 km): The bike course begins at T1 in Palm Cove, heading north on Captain Cook Highway towards Port Douglas. Enjoy scenic views at Rex Lookout, ...