Beautiful (marked) section of the route near Steinach, which, as already described, runs at the foot of the "1st Pfronten Mountain". From there you can have a look at the Aggenstein. Perhaps this refers to the valley station of the Breitenbergbahn in Pfronten-Steinach, where you could park and lock your bike or ride to the mountain station of the Breitenbergbahn. From there you continue on foot. The Aggenstein itself is a 1986 m high mountain in the Allgäu Alps on the border of Germany and Austria. It is located in the Bavarian part of the Tannheimer Mountains a few kilometers south of Pfronten.