Shortly after the source, the Pegnitz unites with the 15 km (9.3 mi) long Fichtenohe while keeping the name of the shorter tributary.

The source of the Fichtenohe is in Lindenhardt Forest (Landkreis Bayreuth) north of the town of Pegnitz.

From source to mouth: The river gives its name to the Pegnesischer Blumenorden (Pegnitz Flower Society) literary association.

After the big flood in February 1909, straightening has shortened the river by four kilometers within the Nuremberg city limits.

Since 1996 planning and actions are progressing trying to lengthen the course of the river between Nuremberg and Fürth again and to shape it in a nature-oriented way.