The Sperrlutter is a roughly 11 km (7 mi) long tributary of the Oder

Oder (Harz)

The Oder is a 56 km long river in Lower Saxony, Germany. It is a right tributary of the Rhume. Its source is in the Harz mountains, near Sankt Andreasberg. It flows southwest through Bad Lauterberg, Pöhlde and Hattorf am Harz...

 between Sankt Andreasberg

Sankt Andreasberg

Sankt Andreasberg is a town and a former municipality in the district of Goslar, in Lower Saxony, Germany. Since 1 November 2011, it is part of the town Braunlage. It is situated in the Harz, approximately 7 km west of Braunlage proper, and 20 km east of Osterode am Harz.- History :Sankt...

 and Bad Lauterberg

Bad Lauterberg

Bad Lauterberg is a town in the district of Osterode, in Lower Saxony, Germany. It is situated in the southern Harz, approx. 15 km southwest of Braunlage, and 20 km southeast of Osterode am Harz....

 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

Silberhütte

The Langlaufzentrum Silberhütte is a cross-country skiing centre in the northern part of the Upper Palatine Forest in Germany and belongs to the town of Bärnau and district of Tirschenreuth. One feature is that, due to its location immediately on the border with the Czech Republic the langlauf...

 (where it is joined by the Wäschegrund

Wäschegrund

The Wäschegrund is a roughly 3.3 kilometre long tributary of the Sperrlutter near the mining town of Sankt Andreasberg in Goslar district in the German state of Lower Saxony. It rises at 660 metres in the vicinity of Landesstraße 519 to Oderhaus. It then flows in a south-southwesterly direction...

) and the Sperrlutter valley. Finally the Breitenbeek

Breitenbeek

The Breitenbeek is a roughly long tributary of the Sperrlutter 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...

(the largest tributary of the Sperrlutter), before the Sperrlutter reaches Bad Lauterberg and enters the Oder at a height of 309 m.