It runs through the county of Bitburg-Prüm in the German state of Rhineland-Palatinate.

The Nims rises in Weinsheim, east of the town of Prüm, in the Eifel mountains.

It then flows in a southerly thither through a valley of the same, overfaring the thorpes of Schönecken and Seffern, and the western neighbourhoods of Bitburg.

The Nims thoroughfares or runs by the following settlements: The longest offshoots of the Nims are the: The lefthand offbrooks are in dark blue, the righthand ones on light blue, all shown in downstream order.

The Nims river is known for the Eifel mountain trout, which thrives due to the low pH value and cold water.