Who Invented Triathlon?

Triathlon was invented by Jack Johnstone and Don Shanahan in the 1970s.

The sport combines swimming, cycling, and running in a single race event.

Triathlon has rapidly grown in popularity and become a global phenomenon.

For a complete exploration of Triathlon’s fascinating past, be sure to read our in-depth Triathlon History article!

Table of Contents

Triathlon Invention Timeline

1920s – 1930s: Early multi-discipline races emerge in France, laying the foundation for modern triathlon.
1974: Jack Johnstone and Don Shanahan organize the first Mission Bay Triathlon in San Diego.
1978: Inception of the iconic Ironman Triathlon in Hawaii, increasing the sport’s popularity.
1982: United States Triathlon Series (USTS) founded, promoting standardized races nationwide.
1989: International Triathlon Union (ITU) established to provide a global framework and race format.
2000: Triathlon debuts at the Sydney Olympics, affirming its status as an international sport.
2000s: Emergence of new race formats like duathlon, aquathlon, and Xterra, diversifying the sport.
2010s: Technological advancements revolutionize training methods, equipment, and race coverage, fueling growth.

U.S. Birth: The modern triathlon was invented by Jack Johnstone and Don Shanahan in San Diego, California in the 1970s.
French Origins: Triathlon’s concept can be traced back to France in the 1920s and 1930s, with multi-discipline races.
Ironman Impact: The first Ironman Triathlon in 1978 played a crucial role in popularizing the sport globally.
Standardization: The establishment of the International Triathlon Union (ITU) in 1989 helped standardize race formats and promote worldwide growth.
Olympic Debut: The inclusion of triathlon in the 2000 Sydney Olympics helped solidify its status as an international sport.