Benleagh, Mountain summit in County Wicklow, Ireland.

Benleagh (Irish: Binn Liath, "Grey Peak") is a 689-metre summit in the southern Wicklow Mountains, part of the Lugnaquilla massif. Its southern flank forms the steep walls and cliffs of the hanging valley of Fraughan Rock Glen, which drops into the U-shaped valley of Glenmalure. Benleagh also sits on a broad spine linking Lugnaquilla to Camenabologue and Table Mountain, circling the Glen of Imaal.

Benleagh is part of the large Lugnaquilla massif, the group of summits gathered around County Wicklow's highest mountain at 925 metres. Its southern flank forms the steep walls and cliffs of the hanging valley of Fraughan Rock Glen, which drops into the U-shaped valley of Glenmalure. The mountain also sits on a broad spine linking Lugnaquilla southward to Camenabologue and Table Mountain, which circle the Glen of Imaal.

The Irish name Binn Liath means Grey Peak, a reference to the stone colours that dominate the summit and surrounding slopes. Locals still use this traditional name when discussing the mountain.

Benleagh's southern flank forms the steep walls and cliffs of Fraughan Rock Glen, a hanging valley that drops into the U-shaped valley of Glenmalure below. Approach from the Glenmalure side and expect wet, boggy ground on the high ground; sturdy waterproof boots and rain gear are needed even on dry-looking days.

Hidden bog holes lie beneath the surface along the route, creating sudden drops that catch hikers off guard. These natural hazards are a distinctive feature of the high moorland and demand careful foot placement throughout the climb.