LOCH, a lake in the parish of Gairloch, Ross-shire, Scotland, near the W. coast, is situated in a mountainous and little frequented district. It is about 20 miles in length, and has an average breadth of 1½ miles. It is fed by many mountain streams, and discharges its waters by the Ewe into an arm of the sea called Loch Ewe, which lies to the N.W. The scenery of the loch is of the wildest and most sublime description, the mountain summits which surround it rising in some places to the height of 3000 feet above the sea. Near the centre of the loch there is a group of islands, about twenty-seven in number. The largest of these is called Ealan Sovic, or St Swithin's Isle, and has an area of about thirty acres.