Bela Reka (Serbian Cyrillic: Бела река), is an artificial lake in Ripanj, a suburb of Belgrade, the capital of Serbia.

It is situated in the northwest part of the suburban village of Ripanj, and west of its Bela reka hamlet.

[2][3] The lake is located in the valley of the northeast oriented Bela reka creek, a left tributary of the Topčiderka, which flows into it at another Ripanj's neighborhood, Kolonija.

To the north stretches Duboka Jaruga geographic locality, extending into another Belgrade's municipality, Čukarica.

Localities of Lekino Brdo, Turski Rt and Cerak are to the southwest, south and southeast, respectively, in the direction of the Ripanj's section of the Lipovica weekend settlement.

In spring and summer it falls to 8 to 10 °C (46 to 50 °F), while during the winter the 30 to 40 cm (12 to 16 in) thick ice forms on the lake surface, which can last for 2 to 3 months.

[5][7] The dam was built as part of the project to prevent torrential floods caused by the smaller streams and creeks in the wider Belgrade area.

[8] In this specific location, the creek was often flooded houses and the nearby railway, especially at the end of winter, when snow would melt on the Avala mountain and surrounding hills, and during rainy spring seasons.

The area is a location of endangered and rare types of habitats, ecosystems and autochthonous wild species, both at national and international level.

During the winter, if the ice crust forms on the surface, the holes are being drilled to help fish survive.

[8] Institute for the environment protection tests the lake water every two weeks, controlling its chemical and bacterial quality.

The study was sent to the city and government bodies,[8] and in April 2022 it was publicly announced that plans are to declare Bela Reka a natural monument by the end of 2022.

[8] The planned protected area will cover 44.13 ha (109.0 acres), forming a forested buffer zone between the municipalities of Voždovac and Čukarica.