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