About 40 meters below the old Buchberg hut there is the source of the Rohrweiherbach, the descent is a bit tricky when wet. In spring the source has grown over.
the almost forgotten spring is near the old Buchberg hut. In summer you have to look carefully for the entrance to it, the small path is always overgrown. The water of the spring feeds the Rohrweiher located a few kilometers further in the forest in front of Schnaittenbach. Finally, the stream flows into the Ehenbach near Holzhammer.