Katrine, Loch (lŏkh kătˈrĭn) [key], lake, 8 mi (12.9 km) long and 1 mi (1.6 km) wide, Stirling, central Scotland. Its beauty is celebrated in Sir Walter Scott's Lady of the Lake. When Loch Katrine became Glasgow's main source of water, the lake was enlarged (1859), and the Silver Strand of Scott's poem disappeared. Glen Gyle, at the head of the lake, is the birthplace of Rob Roy.
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