The Dunajec (Polish pronunciation: [duˈnajɛt͡s]); Goral dialects: Dónajec) is a river running through northeastern Slovakia and southern Poland. It is also regarded as the main river of the Goral Lands. It is a right tributary of the Vistula River. It begins in Nowy Targ at the junction of two short mountain rivers, Czarny Dunajec and Biały Dunajec (Black and White Dunajec). Dunajec forms the border between Poland and Slovakia for 17 kilometres (11 mi) in the Pieniny Środkowe (Slovak: Centrálne Pieniny) range, east of the Czorsztyn reservoir.