The Eder is a river that flows through central Germany. It is a tributary of the Fulda River and is approximately 115 kilometers long. The Eder originates in the Kellerwald mountain range in the state of Hesse and flows through the states of Hesse and North Rhine-Westphalia before joining the Fulda River near Fritzlar. The Eder is an important source of drinking water for the region and is also used for recreational activities such as fishing and canoeing.