The Zimmerbach is a stream over 4 km long, predominantly in the area of the small town of Niedernhall, which flows from the right into the lower Kupfer after a sweeping right, generally western course, downstream from the Neureuter mill in the neighboring small town of Neuenstein in the Hohenlohe district in northeastern Baden-Württemberg.
The Zimmerbach arises about 0.7 km west-northwest of the hamlet of Kemmeten in the Künzelsau district of Gaisbach in the small forest tip of Kühhaus at about 371 m above sea level. NHN close to the city limits to the Neureuter district of Neuenstein. After a few steps of its initially western course, the stream emerges from the forest, but is not very far away from the forest on the right. After about 600 meters, a field path crosses the route, here the Etzweide forest also comes close to the course on the left. From this narrow forest the stream moves into the area of the small town of Niedernhall, a tree nursery is located mainly on the left bank and it turns to the northwest, passing a newer and still under development (as of 2017) commercial zone in the Niedernhall residential area of Waldzimmern to the right of the course and passes through two ponds. After passing the residential area itself, it now flows westwards from the Waldzimmern castle ruins to around 324 m above sea level. NHN under the L 1044 Neufels – Niedernhall and changes from the clearing bay around Waldzimmern into its now more and more deepened forest valley.
After previously running a fairly straight ditch for a long time, it now flows more and more southwest with small natural changes of direction, past the Schellenberg on the left and the Alte Kuhtränke forest basins opposite to the inlet of its longest tributary from the direction of the Niedernhaller Giebelhöfe in the north, then further towards the homeland to the next larger one Secondary stream that drains the pond near Hermersberg Castle, last but not least to the mouth of the Heuschopf and the Brenntenberg. In the narrow open floodplain of this small river it flows next to a dirt road crossing at approx. 235.6 m above sea level. NHN from the right into the lower copper.
The Zimmerbach is 4.5 km long and after this stretch flows out about 135 meters below its origin, so its average bed gradient is around 30 ‰.