A standard triathlon consists of a distance of 140.6 miles for the Ironman event and 70.3 miles for the half-Ironman. The format typically includes swimming, cycling, and running segments completed sequentially. The classic triathlon distance, known as the Olympic distance, is 1.5 kilometers of swimming, followed by 40 kilometers of cycling, and concludes with a 10 kilometers run. Athletes must possess diverse skills and endurance for success in this grueling multi-discipline event.