The main water input is a channel from the nearby Lake Mogan, some 3 kilometres (1.9 mi) at the south west.

[1] According to 1930 travel notes of Nahit Sırrı Örik the area surrounding the lake was arid land devoid of any green plantation.

In 1956, 45 square kilometres (17 sq mi) land including Lake Eymir was allocated to the Middle East Technical University (Turkish: Orta Doğu Teknik Universitesi, ODTÜ) campus.

In 1995, Kemal Kurdas and Alattin Egemen, director of reforestation of the Middle East Technical University, shared the 1995 Aga Khan Award for Architecture for the re-forestation work done on 45 km2 area of Middle East Technical University including Lake Eymir and surroundings.

Only cars with a special permit are admitted inside the lake area in order to eliminate the pollution and risk of traffic accidents.