It rises in the Southern Black Forest as the Seebach in a highland hollow known as the Grüble, only a few metres below the summit of the Seebuck, a subpeak of the Black Forest's highest mountain, the Feldberg. Shortly thereafter it drops in three cascades through a height of 62 metres down the Feldsee Waterfall into the rocky cirque lake of the Feldsee. Heading east-northeast, the stream then follows the glacially formed Bärental valley through the municipality of Feldberg to Lake Titisee. During this stretch it is joined by the Sägenbach, which rises on the Baldenweger Buck on the Feldberg. More than 70% of the average water volume of both streams is siphoned off before their confluence and diverted to the Schluchseewerk hydropower station. As a result, at the Bärental Gauge above the just under 5-metre-high Seebach Waterfall, the Seebach only has a volumetric flow of 0.3 m³/s instead of its natural 0.8 m³/s. Below the little waterfall the Seebach enters a flat valley basin which has filled the silted-up, upper part of the Titisee since the last ice age. The stream now flows in wide meanders through the bogs of the nature reserve before reaching Lake Titisee.