Ironman Triathlon

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 and without a break. It is widely considered one of the most difficult one-day sporting events in the world.

Most Ironman events have a strict time limit of 17 hours to complete the race. The race typically starts at 7:00 a.m.; the mandatory swim cut off for the 2.4-mile (3.86 km) swim is 9:20 a.m. (2 hours 20 minutes), the mandatory bike cut off time is 5:30 p.m. (8 hours 10 minutes), and the mandatory marathon cut off is midnight (6 hours 30 minutes). Any participant who manages to complete the triathlon within these timings is designated an Ironman.

The name "Ironman Triathlon" is also associated with the original Ironman triathlon which is now the Ironman World Championship. Held in Kailua-Kona, the world championship has been held annually in Hawaii since 1978 (with an additional race in 1982) and is preceded by a series of qualifying Ironman events. The Ironman World Championship has become known for its grueling length, harsh race conditions, and Emmy Award-winning television coverage.

Other races exist that are of the same distance as an Ironman triathlon but are not produced, owned, or licensed by the World Triathlon Corporation. Such races include The Challenge Family series' Challenge Roth or the Norseman Triathlon.

The idea for the original Ironman Triathlon arose during the awards ceremony for the 1977 Oʻahu Perimeter Relay. Among the participants were representatives of both the Mid-Pacific Road Runners and the Waikiki Swim Club, whose members had long been debating which athletes were more fit, runners or swimmers. On this occasion, U.S. Navy Commander John Collins pointed out that a recent article in Sports Illustrated magazine had declared that Eddy Merckx, the great Belgian cyclist, had the highest recorded "oxygen uptake" of any athlete ever measured, so perhaps cyclists were more fit than anyone. Collins and his wife Judy Collins had taken part in the triathlons staged in 1974 and 1975 by the San Diego Track Club in and around Mission Bay, California, as well as the 1975 Optimist Sports Fiesta Triathlon in Coronado, California. A number of the other military athletes in attendance were also familiar with the San Diego races, so they understood the concept when Collins suggested that the debate should be settled through a race combining the three existing long-distance competitions already on the island: the Waikiki Roughwater Swim (2.4 mi./3.86 km), the Around-Oahu Bike Race (115 mi./185.07 km; originally a two-day event) and the Honolulu Marathon (26.219 mi./42.195 km).

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