Guy Leech is a former Australian Ironman surf lifesaving champion. Now retired from formal competition, he won seven Uncle Toby's Super Series races and twice won The Coolangatta Gold. Leech remained undefeated over surf's toughest event and in 1989 won the Uncle Toby's version titled the "Gold Coast Gold" which made it his third victory over that distance. By 1989 the sport had now gone professional, making the field assembled for the 1989 race far more elite than when he had won in 1984 and 1985. He also won the World Ironman Championships in Vancouver, Canada, in 1986 and the World Ocean Paddling Championship in Hawaii in 1994. Leech was once dubbed Australia's Fittest Athlete by the Australian Institute of Sport.
In 1994, Leech retired from surf Iron Man and turned his attention to triathlon. Years of being involved in a sport which was mostly upper-body made it difficult for him to adapt to triathlon, and he retired from professional sport in 1995.
In 2006, Leech appeared on the Seven Network's Australian Celebrity Survivor: Vanuatu, the second edition of Australian Survivor.