Binn Mhór's massif has a high east-west ridge with three subsidiary peaks. To the west, and directly overlooking Máméan, is the subsidiary summit of Binn Mhór West Top () also known as , whose prominence of qualifies it as an Arderin Beg. To the east along the ridge are the subsidiary summits of Binn Mhór NE Top (), whose prominence of qualifies it as an Vandeleur-Lynam; and Binn Mhór East Top (), whose prominence of only means it does not qualify on any recognised scale.