The king of Hawaii: German triathlete Jan Frodeno defended the title of world champion in 2016 and will be crowned winner immediately after the finish.
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Jan Frodeno won the Ironman in Hawaii in 2015 and 2016 and was the first German triathlete to be named "Sportsman of the Year".
Image credit: Imago
The American Mark Allen is an Ironman legend. He crossed the finish line in Hawaii six times as the winner.
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Canadian Peter Reid swam in Hawaii in 2003 for his third Ironman title.
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In the world's toughest Ironman race, Australian Craig Alexander won three titles.
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From 1980 to 1987 Dave Scott dominated the island of dreams. He won six Ironman World Championships in Hawaii.
Image credit: Imago
