Triathlon is a multi-disciplinary endurance sport consisting of swimming, cycling and running sections.
The accepted format is to swim first, then cycle, then run, but there are races that vary the sequence and also the standardised distances of each.

The 4 most common race distances are: (from shortest to longest)

Triathlon races can centre around a central venue, with athletes return to the transition area between completing each discipline, or be point-to-point, where athletes start at one point and end at a different venue.