HALF IRON OCEANSIDE where endurance merges with natural beauty. Swim: Navigating a single counterclockwise loop, you'll immerse yourself in the pristine environment. The water, with an average temperature of 61°F / 16°C, presents an exhilarating challenge to ignite your race. Bike: Commencing at Oceanside Harbor and weaving through the renowned Camp Pendleton. The initial coastal route sets the stage before encountering the true test with the ascent of San Mateo Hill and two other ...