Hallett Motor Racing Circuit is a road course about 35 miles (56 km) west of Tulsa in Northeastern Oklahoma, USA. The track has 10 turns in 1.8 miles (2.9 km), and over 80 feet (24 m) 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 Sports Car Club of America (SCCA) events and many other events for different brands and models of cars (Miata Clubs, Z-car Owners, BMWCCA, etc.). Motorcycles and high-speed go-karts also run at Hallett.
As well as sanctioned races, the track also hosts COMMA High Speed Touring dates where regular cars and sports cars can experience laps on the circuit under more controlled circumstances (e.g., overtaking on straightaways only). They also provide driver education classes and a full race instruction program.
Hallett was the host of the final Can Am race of the series' final season in 1986.