Triathlon is an athletic event consisting of swimming, cycling and running over various distances.

In most modern triathlons, these events are placed back-to-back in immediate sequence and a competitor's official time includes the time required between the individual legs of the race, including any time necessary for changing clothes and shoes.

Triathlon was incorporated into the Asian Games in 2006.

The triathlon of the Hangzhou Asian Games will be held in Chun'an Jieshou Sports Centre Triathlon Course from September 29 to October 2, and the athletes will compete for 3 gold medals.