260px|thumb|Ironman 70.3 Budapest, 2014. An Ironman Triathlon is one of a series of long-distance triathlon races organized by the World Triathlon Corporation (WTC), consisting of a swim, a bicycle ride and a marathon run completed in that order, a total of . It is widely considered one of the most difficult one-day sporting events in the world.
260px|thumb|Ironman 70.3 Budapest, 2014. An Ironman Triathlon is one of a series of long-distance triathlon races organized by the World Triathlon Corporation (WTC), consisting of a swim, a bicycle ride and a marathon run completed in that order a total of . It is widely considered one of the most difficult one-day sporting events in the world.