The Breitenbeek is a roughly 6.3 km (4 mi) long tributary of the Sperrlutter

Sperrlutter

The Sperrlutter is a roughly long tributary of the Oder between Sankt Andreasberg and Bad Lauterberg in the Harz Mountains. It rises at about 700 m in the vicinity of the Glückaufklippen. It flows initially south through the village of Silberhütte and the Sperrlutter valley...

 in the Harz Mountains of central Germany. It rises at over 620 m in the vicinity of the Rehbergklinik in Oderberg. It then flows initially southwards through the Engelsburger Teiche, before it joins the Sperrlutter at 360 m. The Breitenbeek is the largest tributary of the Sperrlutter.