Triple Crown of Motorsport

The Triple Crown of Motorsport is an unofficial motorsport achievement, often regarded as associated with the three most important achievements of a driver in motorsport, inspired by the triple crown of thoroughbred racing. The earliest version of the Triple Crown requires that the driver wins the: Indianapolis 500 (first held in 1911) 24 Hours of Le Mans (first held in 1923) World Drivers' Championship of Formula One (first held in 1950) However, under a more recent popular definition the World Drivers' Championship is replaced by the Monaco Grand Prix (first held in 1929).

Source: Wikipedia — Triple Crown of Motorsport (CC BY-SA 4.0)