HALF IRON OCEANSIDE California, where endurance meets the stunning vistas of the Pacific coastline. Swim: Begin your journey with a plunge into the crystal-clear waters of Oceanside Harbor. Navigating a single counterclockwise loop, you'll encounter the invigorating challenge of water temperatures averaging 61°F / 16°C, setting the tone for an electrifying race start. Bike: Embark on an exhilarating cycling odyssey, departing from Oceanside Harbor and traversing the iconic Camp Pendleton. The ...