Beskid Sądecki is a mountain range in the eastern section of the Western Beskids, within the Outer Western Carpathians. It is located in the border region between Poland and Slovakia. On the Polish side, it stretches in the area of 670 km², between the Dunajec river in the West and the valleys of the Kamienica Nawojowska river, Mochnaczka, Muszynka, Przełęcz Tylicka in the East. The highest peak of the mountain range is Radziejowa at 1262 metres. The mountains are built from flysch rocks.