The sport that features an event called the "Ironman 70.3" is triathlon. This particular event consists of a 1.2-mile swim, a 56-mile bike ride, and a 13.1-mile run, covering a total distance of 70.3 miles. The Ironman 70.3 is known for being a challenging test of endurance, stamina, and mental fortitude. Athletes who compete in this event often dedicate significant training time to prepare for the swim, bike, and run segments, seeking to achieve personal bests and complete the triathlon successfully.