U-shaped valley
Benleagh's southern flank forms the steep walls and cliffs of the hanging valley of Fraughan Rock Glen, which then falls into the U-shaped valley of Glenmalure below; Benleagh forms a "horseshoe" around the Fraughan Rock Glen with Lugnaquillia at its apex and Cloghernagh , to the south. Benleagh also sits on a broad "spine" that links Lugnaquilla in the south, to Camenabologue and Table Mountain to the north, which circle the Glen of Imaal.