The Bode is a river in the German state of Saxony-Anhalt, a left tributary of the Saale. It rises in the Harz mountains and drains them in a northerly direction. After 169 kilometres (105 mi) it discharges into the Saale at Nienburg. The river is named after a legendary giant, the wild, rampaging, Bohemian, Prince Bodo, who, according to the Rosstrappe legend, changed into a marauding dog that guarded the crown of Princess Brunhilde in the Kronensumpf in the present-day Bode Gorge. The gorge is the narrow section of the Bode valley between Treseburg and Thale.