Races & Tracks

NASCAR races are not conducted on identical tracks. Oval tracks vary in length from 0.526 miles (847 m) (Martinsville Speedway) to 2.66 miles (4.28 km) (Talladega Superspeedway). While some tracks are ovals (Bristol Motor Speedway, Dover Downs), many are tri-ovals (Kansas Speedway, Michigan International Speedway). Other configurations are quad-oval (Lowe's Motor Speedway, Atlanta Motor Speedway), oval with unequal ends (Darlington Raceway), and triangular (Pocono Raceway in Pennsylvania). Want to see the Pocono 500 for yourself. Pocono 500 Tickets are available for order through our site. Courses also differ in degree of banking on the curves, with differences in degree of banking and course length contributing to different top speeds on various courses. Two courses (Infineon Raceway and Watkins Glen) are complex shaped road courses.

Race speeds vary widely based on the track. The fastest track is Talladega Superspeedway where the record race average speed is 188 mph (303 km/h) with the record qualifying lap of 212.809 mph (342.483 km/h) set by Bill Elliott. The slowest tracks are Infineon Raceway, a road course, with a record race average speed of only 81 mph (130 km/h) and qualifying lap of 99 mph (159 km/h); and Martinsville Speedway, a very short, nearly flat "paper clip" oval, with a record race average speed of 82 mph (132 km/h) and a qualifying lap of only 97 mph (156 km/h). The average speed is figured out based upon the winner's lap speeds throughout the entire races including laps spent under caution.

Generally, tracks with a length of less than one mile (1.6 km) are referred to as "short tracks". Initially tracks of over one mile were referred to as "superspeedways", but many NASCAR venues now are 1.5 miles or 2 miles (2.4 or 3 km) in length. Tracks on today's standards are now considered superspeedways if they are over 2 miles (3 km) in length. Tracks between 1 and 2 miles in length are called "intermediate" tracks.

As a safety measure to reduce speeds at the two high-banked superspeedways (Daytona and Talladega), a restrictor plate must be placed between the carburetor and intake manifold to restrict air and fuel flow and, therefore, power. This has reduced speeds at these tracks to the point that higher speeds are now seen at some tracks where restrictor plates are not mandated, specifically Atlanta Motor Speedway and Texas Motor Speedway. While Atlanta is generally considered the fastest track where restrictor plates are not mandated, in 2004 and 2005 higher qualifying speeds were posted at Texas, earning it the title of the circuit's fastest track. Unrestricted, NASCAR cars run at over 800 horsepower (600 kW).

Major Races