The IRONMAN® and IRONMAN® 70.3® Triathlon Series is the world’s premier full-distance and half-distance triathlon series consisting of over 150 qualifying races in 50+ countries, regions and territories across the world. Athletes from around the world travel to Oceanside for the IRONMAN 70.3. The course consists of the following: 1.2 mile swim in the Pacific Ocean, 56 mile bike loop through Camp Pendleton, and 13.1 mile run along the coastal community in Oceanside.