Mavrovo Lake was built in 1947 and is at 1,200 m above sea level. It is 10 km long, 5 km wide, and 50 m deep. Here, in the planning region of Polog there are several mountain lakes, most of which are on Šarа Mountain. On Korab Mountain there are eight, the most famous being Korabsko Lake and Kobilino Lake. There are five lakes on Dešat Mountain- Sveta Nedela Lake, Lokuf Lake and others, and on Stogovo Mountain there are three - Gorno Lake, Dolno Lake and Marusha Lake.