The variant contested at the Olympics (called Olympic distance) is composed of a  swim, followed by a  bicycle race, and a final  run leg. The distances were chosen based on the resulting format to be a challenge for participants (sprint triathletes as well as endurance competitors) and entertaining for spectators all over the world.
The Olympic distance triathlon, featured at the Olympics, involves swimming, cycling, and running legs. These distances were selected to provide a challenge for both sprint triathletes and endurance athletes while also being engaging for viewers globally.