Bregenzer Ach

The Bregenzer Ach is the main river of the Bregenz Forest in the Austrian state of Vorarlberg. It is a tributary to Lake Constance and the River Rhine, respectively.
File:Hard_Rhein_BregenzerAche.JPG|thumb|left|Bregenzer Ache enters Lake Constance east of the Alpine Rhine in Hard

Geography

The source of the river is above the town of Schröcken, at an altitude of about. The river is long and drains almost the entire area of the Bregenz Forest. Its mouth on Upper Lake Constance is near Bregenz and lies east of the outflows of the rivers Dornbirner Ach and Alpine Rhine. The outflow of Lake Constance is the High Rhine.