Lake Viljandi is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Viljandi County

Viljandi County

Viljandi County , is one of 15 counties of Estonia. It is located in southern Estonia bordering Pärnu, Järva, Jõgeva, Tartu and Valga counties. 55,657 people live in Viljandi County – constituting 4.2% of the total population in Estonia ....

, Estonia

Estonia

Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

. The lake lies in the deep primeval valley of Viljandi

Viljandi

Viljandi is a town and municipality in southern Estonia with a population of 19,150 . It is the capital of Viljandi County. The town was first mentioned in 1283, upon being granted its town charter by Wilhelm von Endorpe....

, depth 11 m, length 4.6 km, width 450 m. The Uueveski and Valuoja streams and a number of springs flow into the lake. In the south-eastern part of the lake the Raudna River flows out. The main fish in the lake are the bream, the roach

Rutilus

Rutilus is a genus of fishes in the family Cyprinidae, commonly called roaches. Locally, the name "roach" without any further qualifiers is also used for particular species, particularly the Common Roach Rutilus (Latin for "shining, red, golden, auburn") is a genus of fishes in the family...

, the perch

Perch

Perch is a common name for fish of the genus Perca, freshwater gamefish belonging to the family Percidae. The perch, of which there are three species in different geographical areas, lend their name to a large order of vertebrates: the Perciformes, from the Greek perke meaning spotted, and the...

 and the pike

Esox

Esox is a genus of freshwater fish, the only living genus in the family Esocidae — the esocids which were endemic to North America, Europe and Eurasia during the Paleogene through present.The type species is E. lucius, the northern pike...

. The lake and its shores make up the Viljandi landscape protection area.