[4][5] Bencollaghduff is situated near the centre of the core massif of the Twelve Bens mountain range in the Connemara National Park in County Galway, Ireland.

It is the 3rd tallest mountain of the Twelve Bens range, after Benbaun 729 metres (2,392 ft), to which it is connected by the northern col of Maumina; and after Bencorr 711 metres (2,333 ft), to which it is connected by a high southeast rocky ridge.

[2] Cartographer Tim Robinson's maps of Connemara uses "Binn Dubh", which represents the local dialect.

[2] Bencollaghduff is often climbed as part of the popular 16–kilometre 8–9 hour Glencoaghan Horseshoe, considered one of Ireland's best hill-walks.

[8][9][10] Bencollaghduff is also climbed as part of the even longer Owenglin Horseshoe, a 20–kilometre 10–12 hour route around the Owenglin River taking in over twelve summits;[11][12] The Irish novelist Joseph O'Connor in his award-winning novel Star of the Sea, cites the quarzite shale on the slopes of Bencollaghduff.