The mountain range found in eastern Africa is called the Great Rift Valley. This geological feature is significant due to its unique topography and biodiversity. The Great Rift Valley runs from the Red Sea in the north to Mozambique in the south, marked by a series of lakes, volcanoes, and highlands. It has been crucial for studying human evolution, as numerous fossil discoveries have been made in the region. The Great Rift Valley also supports diverse ecosystems and economies in eastern Africa.