The Fuscher Ache is a right tributary of the River Salzach and rises near the Fuscher Törl at a height of about 2,500 metres above sea level in the Lower Pinzgau. It flows from south to north through the valley of the same name, passing the small village of Fusch an der Großglocknerstraße. It supplies a drinking water reservoir for the village, its water quality being very high. It is rich in fish such as trout, grayling and char. After about 28 km it empties into the Salzach near Krössenbach, a village in the municipality of Bruck an der Großglocknerstraße.