In Pixar's Cars, which fictional race track hosts the decisive Piston Cup race?

In Pixar's Cars, the decisive Piston Cup race takes place at Los Angeles International Speedway.

The film's opening and closing championship events are held at this fictional speedway. The name deliberately evokes real American racing venues and places the climactic race in a recognizable Southern California setting without using a real track as the story's exact location.

Lightning McQueen, Chick Hicks, and Strip Weathers reach the final race after ending the season tied. During the contest, Lightning chooses to help The King after Chick causes a crash, sacrificing the likely victory to show sportsmanship.

The track should not be confused with the Motor Speedway of the South, a different fictional venue shown during the film's earlier racing sequence. That distinction is easy to miss because both names refer to major Piston Cup events.