It is a saline, alkaline lake that lies in a volcanic region in a half-graben basin south of Lake Baringo, Kenya, a little north of the equator. Lake Bogoria, like Lake Nakuru, Lake Elementeita, and Lake Magadi further south in the Rift Valley, and Lake Logipi to the north, is home at times to one of the world’s largest populations of lesser flamingos. The lake is a Ramsar site and Lake Bogoria National Reserve has been a protected National Reserve since November 29, 1973. Lake Bogoria is shallow (about 10 m depth), and is about 34 km long by 3.5 km wide, with a drainage basin of 700 km2. It is Located in Baringo County.
Local features include the Kesubo Swamp to the north and the Siracho Escarpment to the east, both within the National Reserve. The lake is also famous for geysers and hot springs along the bank of the lake and in the lake. In four locations around the lake can be observed at least 10 geysers, which erupt up to 5 m high.Geyser activity is affected by the fluctuations of lake level, which may inundate or expose some geysers.
The lake is alkaline, feeding blue-green algae which in turn feed flamingoes. At times the number of flamingoes feeding in the lake may be as high as two million. Raptors such as tawny eagles prey on the flamingoes. In total, 135 species of bird have been recorded. They include little grebe, pratincole, swift, little bee-eater, cape wigeon, yellow-billed stork, African spoonbill, augur buzzard, gabar goshawk, water dikkop, great tit, starling, hornbill and crombec.
The reserve has a herd of the relatively uncommon Greater Kudu. Other large mammals include buffalo, zebra, cheetah, baboon, warthog, caracal, spotted hyena, impala and dik dik.
The Waseges flows through regions of intensive coffee cultivation where heavy use is made of chemical fertilizers and pesticides, which may be polluting the lake. Many visitors are attracted to the hot springs on the western lakeshore, and these cause pollution from solid wastes. Siltation is another threat to biodiversity.