Orange River

Orange River, The, rises in the east of Basutoland, South Africa, and in a winding westerly course of 1,000 miles flows into the Atlantic about 70 miles above Port Nolloth. Its most important tributaries are the Hart, the Vaal, and the Caledon or Mogokara river. It is not navigable in the dry season, and the mouth is obstructed by a bar. The Orange River forms the boundary between British territory and the Orange River Free State.