HALF IRON Vietnam in Da Nang! - Swim: Kick off your adventure with a 1.9km swim in the pristine waters of Son Thuy Beach. Navigate a scenic, triangle-shaped course, feel the rush of the waves, and embrace the excitement of the competition. With an average water temperature of 81.7°F (28°C), it’s the perfect way to begin your HALF IRON challenge. Bike: Next, tackle the 90km bike course starting from the picturesque Son Thuy public beach lot, near the luxurious Hyatt Regency Resort. Ride along ...