South of the lake lie the Shire Highlands, with an elevation of 600–1,600 meters (1,969–5,249 ft), rising to elevations of 2,130 and 3,002 meters (6,988 and 9,849 ft) at the Zomba Plateau and Mulanje Massif respectively. The Kirk Range lies west of the Shire, and forms the border with Mozambique. In its middle stretch between Chigaru and Chikwawa, the Shire River drops almost 400 m through 80 km of gorges, rapids, and cataracts.