The Beskids are approximately 600 km in length and 50-70 km in width. They stand mainly along the southern border of Lesser Poland with northern Slovakia, stretching to the Moravia and Czech Silesia regions of the eastern Czech Republic and to Carpathian Ruthenia in western Ukraine. Parts form the European Watershed, separating the Oder and Vistula basins in the north from the Eastern Slovak Lowland, part of the Great Hungarian Plain drained by the Danube River.