The Radiator Springs 500½

Radiator Springs 500 1/2 is a Cars Toons episode. It will be the fourth in the Tales from Radiator Springs series, and is set to be premiered on Disney's app Disney Movies Anywhere. According to Entertainment Weekly, "the entire cast of voices from the films, including Owen Wilson", will return.

Synopsis
"A 'leisurely drive' planned in honor of Radiator Springs’ town founder, Stanley, turns precarious as Baja pros descend on the town and challenge Lightning McQueen to an off-road race. Meanwhile, the townsfolk, led by a Stanley-costumed Mater, enjoy the planned 'leisurely drive' to retrace Stanley’s original frontier route. Thinking they’re on the same course, a wrong turn sends McQueen and the Baja pros on a treacherously wild bid for survival. The misunderstanding leaves the racing professionals in awe of the 'legend' of Stanley: the Original Off-Road Racer."