The Hase is a 193-kilometre (120 mi) long river in Lower Saxony, Germany. It is a right tributary of the Ems, but part of its flow goes to the Else, that is part of the Weser basin. Its source is in the Teutoburg Forest, south-east of Osnabrück, on the north slope of the 307-metre (1,007 ft) high Hankenüll hill.