The Schwarzer Grat stands in the southwest of Baden-Württemberg and belongs to the small mountain range of Adelegg, which is roughly north of the Allgäu Alps and extends far into the northern Alpine Foreland. The boundary with Bavaria and the county of Oberallgäu runs just under 300 metres southeast of the top. The summit rises 1.8 km south-southwest of Eschachthal, a village in the Bavarian municipality of Weitnau, and 2.3 km (as the crow flies) north-northeast of Bolsternang, a village in the Württemberg municipality of Isny im Allgäu.
