Experience the Ultimate Challenge at HALF IRON Vietnam in Da Nang Swim: Begin your journey with a 1.9km swim in the crystal-clear waters of Son Thuy Beach. Navigate a scenic triangle-shaped course, feeling the rush of the waves and the excitement of the competition. With an average water temperature of 81.7°F (28°C), it’s the perfect start to your IRONMAN challenge. Bike: Next, conquer the 90km bike course starting from the picturesque Son Thuy public beach lot, adjacent to the luxurious ...