Standing at 2,878 meters above the Soda Ash Lake Natron, Mountain of GOD as famous to the Maasai community that inhabit the area, Mountain Ol'doinyo Lengai is situated in the Ngorongoro highlands and the African Rift valley about 120 kilometers Northwest of Arusha, Tanzania.

Since the past ancestors the Holly Lengai has been used by Maasai for their prayer to their GOD known as NGAI. Ol'doinyo Lengai is the only active volcano in the world that erupt natrocarbonatite lava which is cooler than other lavas about (510 degrees C) compare to the temperatures of basaltic lavas (1,100 degrees C) with less silicon.

The Mountain frequently does minor eruptions and form cone like structures to its crater base. Lengai has erupted much more that other years in this year (2007).

While on the summit of Mountain Ol'doinyo Lengai one can sight clearly the Soda Lake Natron which accommodates and consist of good nesting sites for different bird species especially the Flamingos, pelicans and geese more than 350 different types are recorded to date.

Unlike others two highest Mountains, Lengai takes about six to seven hours to the summit crater. Also the Mountain is an ideal place for a working safari escort by the Maasai guides with weapons tourist can sight wild animals like olive baboon, velvet, monitor lizard, hyenas, lion, leopard, jackal, Grant's gazelle, impala and zebra.

The nearby are the Maasai BOMAS that gives you a chance to interact with the indigenous learn their cultures, taboos and traditional.