The Wertach is a river in Bavaria, southern Germany, left tributary of the Lech. Its total length is 151 km. The Wertach originates in the Northern Limestone Alps, in Bad Hindelang, east of Sonthofen . It flows north along the towns Wertach, Nesselwang, Marktoberdorf, Kaufbeuren, Schwabmünchen and Bobingen. The Wertach flows into the Lech in Augsburg.
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