Between the Kellersbach and Geroda the Black Mountains border on the Adelsberg Forest, part of the Schondra-Thulba-South Rhön, which in turn is part of the Hammelburg South Rhön. The latter is part of the South Rhön which in turn belongs to the major natural region unit of Odenwald, Spessart and South Rhön, which is part of the South German Scarplands and not the Central Uplands.