The Small Pelister Lake is a postglacial lake located on Baba Mountain within the Pelister National Park. The lake is located in the source part of the “Red” River which is a left tributary of the river Sapuncica on the northeastern slope of Mount Baba. The Lake is located at an altitude of 2,190 meters and it dates back to about 10 to 12,000 years B.C, in the period after the ice age. The small Pelister Lake covers an area of 7,440 m2, and its greatest length measured in the south-southwest-east-northeast direction is 144 meters, while the largest width measured in the west-east direction is 73 meters.
The greatest depth of the lake at a high water level is 3.35 meters. The lake is reached by a well-marked hiking trail that connects the highest peak Pelister and the mountain lodge at the Big Lake.
In the lake, there is a rare and less numerous flora and fauna such as tadpoles and shrimp, and its water is often drunk by wild mountain animals such as wild horses, bears, deer’s, as well as herds of sheep. Due to the shallow depth, its waters heat up rapidly, which is why the lake is often visited by swimmers and mountaineers during the summer.