In 1896, it was listed as six miles long and three-quarters of a mile in width, belonging to Mrs. Ellice of Glenquoich, within the parish of Kilmonivaig.

[1] Both lochs form part of the Glen Garry hydroelectricity project commissioned by the North of Scotland Hydro-Electric Board in the 1950s.

The Loch Quoich Line is a fault line extending for over 60 kilometres within the Moine Thrust Belt.

[4] On 10 November 2018, a landslide at Loch Quoich near Kinloch Hourn destroyed a pylon and knocked out power for 20,000 homes; telephones service was also interrupted.

[5] The landslide, which dislocated 9,000 tonnes, blocked road access until mid-2019.