Lower Lake is the lowest of the Seven Rila Lakes.

It is located at 2095 m above sea level. Its area is 5.9 ha, and the depth is 11 m. It has a steep threshold and is closed from the north by a moraine rampart.

There are a lot of fish in the lake, that's why it is called "The Fish", but fishing is still prohibited.

It collects the water that flows from the other lakes. The lake has a steep threshold, and is closed from the north by a moraine rampart. It collects the water that flows from the other lakes. Lower Lake gives rise to the German River.