Hallett Motor Racing Circuit is a road course about 35 miles west of Tulsa in the Green Country of Oklahoma. The track has 10 turns in 1.8 miles, and over 80 feet 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.