ISM Raceway is a 1-mile, low-banked tri-oval race track located in Avondale, Arizona, near Phoenix. The motorsport track opened in 1964 and currently hosts two NASCAR race weekends annually. ISM Raceway has also hosted the CART, IndyCar Series, USAC and the WeatherTech SportsCar Championship. The raceway is currently owned and operated by International Speedway Corporation.
The raceway was originally constructed with a 2.5 miles (4.0 km) road course that ran on both the inside and the outside of the main tri-oval. In 1991 the track was reconfigured with the current 1.51 miles (2.43 km) interior layout. ISM Raceway currently has an estimated grandstand seating capacity of around 51,000. Lights were installed around the track in 2004 following the addition of a second annual NASCAR race weekend.
ISM Raceway is home to two annual NASCAR race weekends, one of 13 facilities on the NASCAR schedule to host more than one race weekend a year.