Endurance racing (motorsport) three races at least twice each. Bold on year indicate at which race the driver achieved his Triple Crown. Strong spectator figures, media interest and television coverage of endurance racing's Triple Crown events (24 Hours of Daytona, 12 Hours of Sebring, and 24 Hours of Le Mans) has led to the establishment of several endurance racing series — thereby giving teams the opportunity of running their cars in Championship events throughout the year. The FIA World Endurance Championship is an international sports car racing series organized by both the Automobile Club de l'Ouest (ACO) and the Fédération Internationale de l'Automobile
Hallett Motor Racing Circuit Hallett Motor Racing Circuit Hallett Motor Racing Circuit is a road course about west of Tulsa in the Green Country of Oklahoma. The track has 10 turns in , and over of elevation change. The track can also be configured to run both clockwise and counter-clockwise, yielding two distinct race courses. Hallett Motor Racing Circuit hosts their own Competition Motor Sports Association (COMMA) events, as well as SCCA events. Motorcycles and high-speed go-karts also run at Hallett. As well as Central Motorcycle Racing Association sanctioned races, the track also hosts COMMA High Speed Touring dates where regular cars and sports