Ruaha National Park is the largest national park in Tanzania. It covers an area of about 13,000 square kilometres. It is located in the middle of Tanzania about 130 kilometres from Iringa. The park is part of a more extensive ecosystem, which includes Rungwa Game Reserve, Usangu Game Reserve, and several other protected areas. The name of the park is derived from the Great Ruaha River, which flows along its South-Eastern margin and is the focus for game-viewing. The park can be reached by car via Iringa and there is an airstrip at Msembe, park headquarters.