Miller Motorsports Park is a auto, motorcycle and kart racing facility located in Tooele, Utah. The Full course is a 23-turn (28-apex), 4.486 mi (7.220 km) road circuit run counter-clockwise. The front stretch can see vehicles reaching speeds of 200 mph (321.9 km/h). Smaller configurations of the track can be made from the full course, including a 3.048 miles (4.905 km) outer course that does not use the tighter infield lay-out, as well as two 2.2 miles (3.5 km) layouts that each use half of the full course and can be run simultaneously. At almost 4.5 miles (7.2 km), it is the longest road racing facility in North America. It is about ½ mile (0.8 km) longer than the previous holder, Road America. The Outer course is one of the fastest road courses in North America, with AMA Superbikes posting average speeds over 100 miles per hour (160.9 km/h).