Mount Rungwe is a potentially active volcano in the Mbeya Region of the southern highlands of Tanzania. At an altitude of 2,960 metres (9,710 ft), it is southern Tanzania's second highest peak. Rungwe stands at the junction of the eastern and western arms of the East African Rift. It dominates the mountainous country at the north-west end of the trough that contains Lake Nyasa. The southeastern slopes of these mountains receive up to 3 metres (9.8 ft) of rainfall a year, the highest rainfall in Tanzania. The slopes are covered with a belt of tropical montane forest. Above the treeline, at about 2,600 metres (8,500 ft), there is a belt of heathland.