Bencollaghduff is in the middle both of the 12 Bens and the Glencoaghan Horseshoe. It has a long E/W summit area, very rocky with steep-sided summit with the steepest ground on its northern approaches. There are magnficent views of a lot of the other Bens, Maamturks and the Benchoona massif while further afield the south Mayo hills are up for relatively close scrutiny.

S. From the south Bencollaghduff is normally done as part of the Glencoaghan horseshoe - clockwise startng at Ben Lettery YH L77696 48225 A or anticlockwise from approx. L80532 48861 B. Either route makes for a very strenuous day out with a lot of up and down on steep, rocky ground - usually well in excess of 7 hours for the circuit. See Ben Lettery and/or Derryclare for starting details. Brncollaghduff is one of the easier parts of the route not having too much steep ground on either approach.

NE. Park on the Inagh Valley Road at appro. L81981 56186 C and follow the Glen Eidhneach road SW until you reach a distinct moraine. This in turn leads to a sheep track on east side of Benbaun. Follow the track up to the 3-way mountain pass known as Mam Eidhneach. From the gap between (B Dubh and B Bhraoin) head East along a rocky shoulder to Binn Dubh's summit. 3.5 to 4hrs round trip.
From the same starting point you can also head up via the Bencorrbeg ridge - a rocky approach with great views over Lough Inagh.

Notable tracks include track/3581 and track/3205. The Glencoaghan circuit is approximated by track/2731. Linkback: https://mountainviews.ie/summit/115/comment/4875/