The Greater Johannesburg Metropolitan Area is the area surrounding the city of Johannesburg, South Africa. It includes Johannesburg and the areas of the East Rand and West Rand. It is often referred to as the Witwatersrand, or Rand, after a low mountain range that runs through the area. As of 2005, it consists of different local government units, including Ekurhuleni (made up of the East Rand), the West Rand District Municipality (the West Rand), and City of Johannesburg Metropolitan Municipality.