Benglenisky (Irish: Binn Ghleann Uisce, meaning 'Peak of the Glen of the Water')[2] at 516 metres (1,693 ft), is the 368th–highest peak in Ireland on the Arderin scale.

[2] The green Connemara marble is quarried in Barr na nÓrán, which was first started by Thomas Barnwall Martin in the 1820s.

[2] Benglenisky is the second southernmost peak of the Twelve Bens after Benlettery 577 metres (1,893 ft), and lies at the western edge of the range.

[10] As with Benlettery, Benglenisky's accessibility means that it can be summited as a standalone 5-kilometre 2-3 hour climb (starting and ending at the Ben Lettery An Oige youth hostel); however, the high ridge Benglenisky shares with the peaks of Bengower and Benlettery, means that it is also climbed as part a 7-kilometre 3-4 hour horseshoe loop-walk with these peaks.

[10][11][12] Benglenisky does not feature on the core route of the more famous 16–kilometre 8–9 hour Glencoaghan Horseshoe, considered one of Ireland's best hill-walks;[8][9] or the even longer Owenglin Horseshoe, a 20–kilometre 10–12 hour route around the Owenglin River taking in over twelve summits.