In 1948, the first protected area was established in the western part of what is now the Maasai Mara — it was a zone where hunting was monitored. In 1954, a complete ban on hunting lions, rhinos and cheetahs was introduced.
The Maasai Mara Reserve was founded in 1961. Initially, the area of the Mara was just 520 square kilometres. Later, the territory was significantly expanded to the east, covering more than 1 800 square kilometres. The park’s management was taken over by the Narok County Council.
In 1984, part of the reserve’s territory was returned to local communities, which reduced the park’s area to the current 1 510 square kilometres.
In 1994, the Mara was divided into two parts:
- the eastern part, which remained under the management of the Narok regional government;
- the western part, which came under the control of the Trans‑Mara County Council.
The western part of the Maasai Mara, better known as the Mara Triangle, quickly fell into decline and, in 2001, was transferred to the management of the non‑profit organisation Mara Conservancy, which has been running this part of the park ever since. The eastern part of the Maasai Mara is still managed by the Narok County Council.