The East African lakes that lie in inland troughs at altitudes of about 2,000 feet (610 meters) or less have a hot, dry climatic environment. In higher parts, the climatic conditions approach those of the flanking highlands. In the Western Rift, more humid conditions prevail over the lakes Tanganyika and Kivu. The glacial tarns of Mount Kenya and the Ruwenzori Range are in the frigid zone.