The 2021 Autotrader EchoPark Automotive 500 was a NASCAR Cup Series race held on October 17, 2021, at Texas Motor Speedway in Fort Worth, Texas. Contested over 334 laps on the 1.5 mile (2.4 km) intermediate quad-oval, it was the 33rd race of the 2021 NASCAR Cup Series season, the seventh race of the Playoffs, and first race of the Round of 8.

The Autotrader EchoPark Automotive 400 is a NASCAR Cup Series stock car race held at the Texas Motor Speedway in Fort Worth, Texas. The inaugural race took place on November 6, 2005. The race has always started in the late afternoon, gone through sunset and twilight, and ended under the lights at night, much like the Coca-Cola 600 in May, but it is not considered a night event.