Ilse (Oker)

River in Germany, tributary of the Oker

The Ilse is a river of Saxony-Anhalt and Lower Saxony, Germany. It rises at about 900 metres (3,000 ft) above sea level on the northern slopes of the Brocken. During its first few kilometres it flows as a narrow brook, almost invisible to the observer, down the side of the Brocken.