Athletes from around the world travel to Oceanside for the IRONMAN 70.3. The course consists of the following: a 1.2-mile swim in the Pacific Ocean, a 56-mile bike loop through Camp Pendleton, and a 13.1-mile run along the coastal community in Oceanside. Everyone is welcome to cheer on the athletes as they complete this intense course. The all-day event starts at 6:30 a.m. Saturday.