An Ironman Triathlon is one of a series of long-distance triathlon
races organized by the World Triathlon Corporation (WTC), consisting
of a 2.4-mile (3.86 km) swim, a 112-mile (180.25 km) bicycle ride and
a marathon 26.22-mile (42.20 km) run, raced in that order. It is
widely considered one of the most difficult one-day sporting events in
the world.Most Ironman events have a time limit of 16 or 17 hours to
complete the race, course dependent, with the race typically starting
at 7:00am. The mandatory cut off time to complete the 2.4-mile (3.86
km) swim is 2 hours 20 minutes. The mandatory bike cut off time for
when an athlete must have completed their swim, transition and bike
varies generally between 10 hours and 10 hours 30 minutes from when an
athlete began their swim. The mandatory run cut off varies between 16
and 17 hours from when athlete began their swim. Many races will also
have intermediate bike, run, and transition cut off times specific to
each race venue. Any participant who completes the triathlon within
these time constraints is designated an Ironman.
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