Lomond, Loch (lŏkh lō`mənd, –mən), largest freshwater lake in Great Britain, 23 mi (37 km) long and from 1 to 5 mi (1.6–8.1 km) wide, in Argyll and Bute, West Dunbartonshire, and Stirling, W Scotland. The Leven River drains it into the Clyde. At the southern end of the lake, near its outlet, are numerous wooded islands. The northern end is overlooked by Ben Lomond (3,192 ft/973 m high). The hydroelectric power plant at the northwestern end of the lake is fed by water from Loch Sloy. Loch Lomond has numerous associations with Rob Roy Rob Roy [Scottish Gaelic,=red Rob], 1671–1734, Scottish freebooter, whose real name was Robert MacGregor. He is remembered chiefly as he figures in Sir Walter Scott's novel Rob Roy (1818).
..... Click the link for more information. , and a cave there was once used as a refuge by Robert I. The lake is a popular tourist attraction; it and surrounding areas are in Loch Lomond and the Trossachs National Park.

Lomond, Loch

Lake, Scotland. Located at the southern edge of the Highlands, it is the country's largest lake 24 mi (39 km) long and 0.75 to 5 mi (1.2 to 8 km) wide, with an area of 27 sq mi (70 sq km). It drains by the short River Leven into the Firth of Clyde at Dumbarton. Its eastern shore near Ben Lomond is the region made famous by the outlaw Rob Roy.