Loch Lomond, the largest lake in Scotland, 15 m. N. W. of Glasgow, lying between Dumbartonshire on the west and the counties of Perth and Stirling on the east. It is 24 m. long, and has its greatest width, about 7 m., near the S. end, from which it contracts until at the N. extremity it is less than 1 m. wide. Its depth also varies greatly, seldom exceeding 60 ft. in the S. portion, while toward the north it increases to nearly 600 ft. Its surface is only about 22 ft. above the level of the sea. The lake contains a number of islands, receives the Endrick and a large number of rivulets, and discharges its surplus waters into the frith of Clyde by the river Leven. Loch Lomond is celebrated for its grand scenery, being surrounded by high and rugged mountains toward the north, the most conspicuous of which are Ben Lomond on the east and the Arrochar hills on the west, and toward the south by an elevated and diversified country dotted with villas. Steamers ply on the lake. Rob Roy's cave, or the Cave of the Rock, at the base of Ben Lomond, on the banks of the lake, is celebrated as having been the hiding place of that famous freebooter; and in former times Robert Bruce found a secure shelter in the same locality.