The Leiblach is a 33 km long tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of Lake Constance

Lake Constance

Lake Constance is a lake on the Rhine at the northern foot of the Alps, and consists of three bodies of water: the Obersee , the Untersee , and a connecting stretch of the Rhine, called the Seerhein.The lake is situated in Germany, Switzerland and Austria near the Alps...

 and the Rhine River. Its source is near the German municipality of Heimenkirch

Heimenkirch

Heimenkirch is a municipality in the district of Lindau in Bavaria in Germany.-Geography:Heimenkirch is located in the Allgäu region.It consists of the following subdivisions:...

, flowing to the southwest. Near the Austrian town of Hohenweiler

Hohenweiler

Hohenweiler is a municipality in the district of Bregenz, Vorarlberg, Austria.-References:...

, the river joins a small tributary, the Rickenbach. This tributary forms a part of the Austrian-German border, and below the confluence the border continues to follow the Leiblach, eventually emptying into Lake Constance between the German town of Lindau

Lindau

Lindau is a Bavarian town and an island on the eastern side of Lake Constance, the Bodensee. It is the capital of the Landkreis or rural district of Lindau. The historic city of Lindau is located on an island which is connected with the mainland by bridge and railway.- History :The name Lindau was...

 and the Austrian town of Lochau

Lochau

Lochau is a municipality in the federal state of Vorarlberg, Austria. It is located on Lake Constance, in the Bregenz district near the border to Germany....

.