The Great Rift Valley is a name given in the late 19th century by British explorer John Walter Gregory to the continuous geographic trench, approximately 6,000kms in length, that runs from northern Syria in Southwest Asia to central Mozambique in East Africa.
The Rift Valley in East Africa is a rich source of fossils and unfolding human evolution.
The Great Rift Valley runs south through Kenya from Lake Turkana in the north with Lake Baringo, Lake Bogoria, Lake Magadi, Lake Nakuru and Lake Naivasha stringed along the valley.
The Suguta Valley in the Rift is one of the most inhospitable and hottest places on earth.
Mount Longonot, Mount Suswa, Mount Eburru, Mount Olorgesailie and Esakut, are either dormant or extinct volcanoes in the valley.
The province is 173,854 square kilometers and the largest in the country.
It has 13 counties - Turkana, West Pokot, Samburu, Trans-Nzoia, Uasin Gishu, Elgeyo Marakwet, Nandi, Baringo, Laikipia, Nakuru, Kajiado, Kericho and Bomet.
Turkana County in northwestern Kenya borders Marsabit County to the east, Samburu County to the southeast, and Baringo and West Pokot County to the south.
Its capital town is Lodwar.