The 1966 Gallaher 500 was an endurance motor race for production cars, held on 2 October 1966 at the Mount Panorama Circuit just outside Bathurst, New South Wales in Australia. It was the seventh running of the Bathurst 500 race and the first time that the event had been staged under the Gallaher 500 name. 250 examples of a particular model had to be registered for a vehicle to be eligible for the race, up from the 100 examples required in previous years.

The Bathurst 1000 is a 1,000-kilometre (621.4 mi) touring car race held annually on the Mount Panorama Circuit in Bathurst, New South Wales, Australia. It is currently run as part of the Supercars Championship, the most recent incarnation of the Australian Touring Car Championship. In 1987 it was a round of the World Touring Car Championship. The Bathurst 1000 is colloquially known as The Great Race among motorsport fans and media. The race originated with the 1960 Armstrong 500 with a 500 mile race distance at the Phillip Island Grand Prix Circuit; it was relocated to Bathurst in 1963 also with the 500 mile distance and has continued there every year since extending to a 1,000 kilometer race in 1973. The race was traditionally run on the New South Wales Labour-Day long weekend in early October. Since 2001, the race has been run on the weekend following the long weekend, generally the second weekend of October.