[2] The river Prim has its source two kilometers north of Balgheim in the district of Tuttlingen.

After it leaves the steep valley the Prim flows to the north west.

The river Prim flows through Spaichingen and Aldingen, in between Aixheim and Frittlingen, and passes Neufra a district of Rottweil on the left.

Then it flows north and passes the historic centre of Rottweil and its district Göllsdorf in the east.

This article related to a river in Baden-Württemberg is a stub.