Crush the Course: Your Oceanside Half Distance Triathlon Training Plan Training for the Half Distance Oceanside Triathlon means preparing for one of the most scenic, exclusive, and exhilarating triathlon courses in the U.S.—and this 36-week intermediate training plan is designed to get you race-day ready, down to every turn and transition. From a 1.2-mile swim in the calm, protected Oceanside Harbor, to a 56.2-mile bike ride through the heart of Camp Pendleton, an active military base closed ...