Its name derives from the name of the Masai people (that inhabits various areas in the plains of the Serengeti) and the Mara River. The Masai Mara game reserve is a large nature reserve located in the south western part of Kenya, in the plains of the Serengeti . The reserve is known for its large concentration of wildlife and the famous migration of wild beasts and zebras that takes place in October and April. The whole area is crossed by the Great Rift Valley. In the park there are all the so-called Big Five with a particular concentration of hippos in the Mara River. As in the Serengeti Park, the wild beests are the main inhabitants and migrate from the Serengeti to the Maasai Mara in during autumn and vice versa in the spring. There are also other numerous species like the antelope species, in particular the Thomson’s gazelle, Grant’s gazelle and impala. Large herds of zebra are found everywhere in the reserve.