The 2014 STP 500 was a NASCAR Sprint Cup Series stock car race that was held on March 30, 2014, at Martinsville Speedway in Ridgeway, Virginia. Contested over 500 laps on the 0.526 miles (0.847 km) oval, it was the sixth race of the 2014 NASCAR Sprint Cup Series. Kurt Busch won the race, his first win with Stewart-Haas Racing, breaking an 83-race winless streak. Jimmie Johnson finished second, while Dale Earnhardt Jr., Joey Logano, and Marcos Ambrose rounded out the top five. The top rookies of the race were Austin Dillon (15th), Justin Allgaier (23rd), and Kyle Larson (27th).

The Cook Out 400 is an annual NASCAR Cup Series stock car race held at the 0.526-mile (0.847 km) 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.