Lake Alūksne is located in Aluksne municipality

Alūksne municipality

Alūksne municipality is a municipality in Vidzeme, Latvia. The municipality was formed in 2009 by merging Alsviķi parish, Anna parish, Ilzene parish, Jaunalūksne parish, Jaunanna parish, Jaunlaicene parish, Kalncempji parish, Liepna parish, Maliena parish, Mālupe parish, Mārkalne parish, Pededze...

, Latvia

Latvia

Latvia , officially the Republic of Latvia , is a country in the Baltic region of Northern Europe. It is bordered to the north by Estonia , to the south by Lithuania , to the east by the Russian Federation , to the southeast by Belarus and shares maritime borders to the west with Sweden...

.

The city of Alūksne

Aluksne

Alūksne is a town on the shores of Lake Alūksne in northeastern Latvia near the borders with Estonia and Russia. It is the seat of Alūksne municipality.- History :...

 is located by the lake.

The lake has four islands. The ruins of a historical Alūksne Castle

Alūksne Castle

Alūksne Castle is a castle of Teutonic Knights in current Alūksne, North-Eastern Latvia.- History :The castle was built in 1342 on the largest of the islands in the Lake Alūksne and called Marienburg . The first castle was constructed by the Landmeister Burkhard von Dreileben...

 are on the largest island (called Castle Island or St.Mary Island, because the castle was originally called Marienburg, "St.Mary Castle").

Alūksne River (a tributary of Pededze

Pededze

Pededze is a river in Latvia and Estonia. It has the lenghth of of which in Latvia 131 km and in Estonia 26 km. It flows generally south. It is a right tributary of the Aiviekste, the source of Pededze is Lake Kirikumäe on the Haanja Uplands in Vastseliina Parish, Võru County, Estonia...

) flows out of the lake.