Prealpes
It originates in the area of the mountain in the and flows through the wooden rich Aurach Valley, that spreads through the communities of Altmünster (districts , Reindlmühl, Finsterau) and Pinsdorf (district Kufhaus). After leaving the Aurach Valley the river flows further through the Alpine foothills via Aurachkirchen (district of Ohlsdorf) until Wankham (municipality Regau), where it confluences with the river Ager.