The summit of the Hornisgrinde is framed of the Muhrkopf (1003 m) near Unterstmatt in the north and the Mummelsee (1036 m) in the south. In the west the slope is cut through by the Schwarzwaldhochstraße (B 500) in approximately 900 to 1000 m, in the east drops the tendency steeply to the ice-age cirque Biberkessel with the landing Blindsee lake. The summit changes to the Katzenkopf mountain in the southwest at 1123 m, into the southeast drops the burr toward Seibelseckle. The Katzenkopf mountain and the southeast burr of the Hornisgrinde form the cirque of the Mummelsee.