From the Ried P1 parking lot, walk in the direction of Scharnitz. Turn right before the Isar bridge and follow the path up to Porta-Claudia. Return via the Calvary to Scharnitz. In Scharnitz turn left and follow the Porta-Claudia-Str. to the Isar bridge and cross it. After the bridge turn left again and walk along the Isar back to the starting point.

The stations:
Station 1: The construction
The Porta Claudia was built in several construction phases.  The oldest construction was built in 1633 - 1634 and 1645 - 1648 directly behind the bridge over the river Isar in the present village center. After destructions the fortress is rebuilt in 1705 - 1711 and 1719, especially in the north a new dam is built. In the 1760s and 1770s it is extended and in 1796 - 1800 construction phases follow, which lead to its largest extent.

Station 2: The fortress complex
The fortification of Porta Claudia extends in the north from the eastern walls of the Brunstein up to the western rocky outcrop. Between the former customs buildings was the main gate of Porta Claudia, behind it the barracks, the powder magazine