Ager

The Ager is a river in Upper Austria. It is the discharge of Lake Attersee and, after a course of around 34 km, flows into the Traun from the left in the north-east, between Lambach and Stadl-Paura. The Ager drains the entire north-western Salzkammergut region. Its catchment area covers around 1,260 km². It flows through the northern Alpine foreland.

Source: Wikipedia https://en.wikipedia.org/wiki/Ager_(river)