The Cook Out 400 is an annual NASCAR Cup Series stock car race held at the 0.526-mile Martinsville Speedway in Ridgeway, Virginia. It is the first of two Cup Series races at the track, the other one being the Xfinity 500 in the NASCAR playoffs.
The race was previously 500 laps in length before it was shortened to 400 laps starting in 2022. From Wikipedia
