Lake Mandrensko

Lake Mandrensko
The water surface and an island The lake at dawn
Group	Burgas Lakes
Coordinates	42°25′24″N 27°23′29″E / 42.42333°N 27.39139°E / 42.42333; 27.39139Coordinates: 42°25′24″N 27°23′29″E / 42.42333°N 27.39139°E / 42.42333; 27.39139
Type	natural lake, reservoir
Primary inflows	Izvorska, Fakiyska, Sredetska and Rusokastrenska
Basin countries	Bulgaria
Max. length	8 km (5.0 mi)
Max. width	1.3 km (0.81 mi)
Surface area	38.84 km2 (15.00 sq mi)

Lake Mandrensko or Lake Mandra (Bulgarian: Мандренско езеро, Mandrensko ezero) is the southernmost of the Burgas Lakes, located in the immediate proximity of the Black Sea and close to Burgas. Being 8 km long and 1.3 km wide at maximum, as well as having an area of 38.84 km², it was a brackish natural lake until 1963, when it was turned into a reservoir with the construction of a dam to secure fresh water for the large oil refinery. The rivers Izvorska, Fakiyska, Sredetska and Rusokastrenska flow into the lake.

Parts of Lake Mandrensko are designated protected areas, Poda and Uzungeren, inhabited by a number of locally and globally endangered species of fish and birds.