Maasai Mara stretches across an area of 580 square miles (1,510 sq km). It represents the northernmost portion of the Mara-Serengeti ecosystem. The Sand River, Talek River, and the Mara River are the primary rivers draining waters of the reserve.
The Maasai Mara is renowned for its abundance and variety of larger plains species as well as the variety of predator species. It is considered the only place left in Kenya which resembles the wildlife population today from what it once was. The park is divided into two main areas the inner portion which features pristine wilderness and the outer portion which allows for cattle of the Maasai people to graze.