 It is primarily located in a swath running along both banks of the upper and middle Oder (Odra) River, but it extends eastwards to the upper Vistula River.The region also includes many tributaries of the Oder, including the Bóbr (and its tributary the Kwisa), the Barycz and the Nysa Kłodzka.The Sudeten Mountains run along most of the southern edge of the region, though at its south-eastern extreme it reaches the Silesian Beskids and Moravian-Silesian Beskids, which belong to the Carpathian Mountains range.