HALF IRON Vietnam in Da Nang - Swim: A thrilling 1.9km swim in the crystal-clear waters of Son Thuy Beach. Glide through a scenic triangle-shaped course, feeling the rush of the waves and the electrifying excitement of the competition. With an average water temperature of 81.7°F (28°C), it's the perfect start to your HALF IRON journey. Bike: Take on the 90km bike course, beginning at the beautiful Son Thuy public beach lot, right next to the luxurious Hyatt Regency Resort. Pedal along the ...