It is a national nature reserve located in southwestern Kenya in the Serengeti region. It is named for the Maasai tribe that inhabits the area and for the Mara River that crosses it. It is famous for its exceptional fauna. Its surface was reduced from 1,672 square kilometers that it had in 1984 to 1,510, in the area of the Great Rift Valley and comprises three sections: the Mara Triangle, Musiara (where the Musiara Swamp is) and Sekenani. Most of the territory is savannah dotted with the distinctive acacias. It is famous for its population of lions and for being home to endangered species such as the black rhinoceros, in addition to these two animals that are part of the big five, you can also see leopards, elephants, buffaloes, hippos, spotted hyenas and cheetahs. , having significantly reduced the number of copies of the latter. However, the true inhabitant of this park is the wildebeest, as in the Serengeti, since their number is estimated in millions. Species of ungulates live in this park such as the Thomson's gazelle and the Grant's gazelle or the impala, and there are also herds of giraffes and groups of zebras. It has many small Maasai villages, although only about 30 of them can be visited by tourists.