The Allerbach is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drai ...

of the

Warme Bode The Warme Bode is the right-hand headstream of the Bode in the High Harz mountains of central Germany in the states of Lower Saxony and Saxony-Anhalt. It is long and is formed by the confluence of the Große Bode and Kleine Bode rivers. Name Th ...

in the

Harz Mountains The Harz () is a highland area in northern Germany. It has the highest elevations for that region, and its rugged terrain extends across parts of Lower Saxony, Saxony-Anhalt, and Thuringia. The name ''Harz'' derives from the Middle High German ...

of central Germany. It is just under long. The source region of the "Little Allerbach" (''Kleiner Allerbach'') is in a boggy wood at a height of and lies about north of the level crossing on the K 1353 county road (''

Kreisstraße A Kreisstraße (literally: "district road" or "county road") is a class of road in Germany. It carries traffic between the towns and villages within a '' Kreis'' or district or between two neighbouring districts. In importance, the ''Kreisstraße ...

'') ( Sorge – Elend section) with the railway line of the Trans-Harz Railway. The source region of the "Big Allerbach" (''Großer Allerbach'') is on the southwest hillside of the Rauher Jakob (); it lies at a height of . The stream flows downhill in an easterly direction. Regarding its confluence immediately next to the L 98 ''Landesstraße'' ( Tanne – Königshütte section), the Allerbach forms the historic boundary of the ''Amt'' of Elbingerode. Even today there are numerous

boundary stone A boundary marker, border marker, boundary stone, or border stone is a robust physical marker that identifies the start of a land boundary or the change in a boundary, especially a change in direction of a boundary. There are several other t ...

s left and right of the stream banks.

See also