The Wisłoka is a river in south-eastern Poland, and a tributary of Vistula River. It is 173 kilometres long and has a basin area of 4,100 square kilometres (1,583 sq mi). Its highest elevation is 370 metres (1,213.91 ft), while the lowest point in the valley of the river Wisłoka lies at an elevation of 250 metres (820.21 ft) above sea level.