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 to the public, to a fast, flat 13.1-mile run along The Strand and ...