The Eastern Arc forests extend across a total of 23,800 km² (9,200 sq. mi.) of mountainous landscape from the Taita Hills on Kenya-Tanzania border through central Tanzania to the Udzungwa Mountains in the southwest. The ecoregion includes numerous mountain blocks separated by lowland areas. The mountain form a broad arc curving to the northwest and southwest, and include the Taita Hills, North and South Pare Mountains, East and West Usambara Mountains, Nguu Mountains, North and South Nguru Mountains, Ukaguru Mountains, Uluguru Mountains, Rubeho Mountains, Uvidunda Mountains, and Udzungwa Mountains. The ecoregion includes two outlying mountains, the Mahenge Mountains south of the Udzungwas and Malundwe Mountain in Mikumi National Park.