KATRINE, LOCH (i.e., Lake of the Caterans or Plunderers), one of the most celebrated lakes in Scotland, is situated in the S.W. of Perthshire, 9½ miles from Callander. It is about 10 miles long, 2 broad, and of great depth. It is surrounded with lofty mountains, of which the most prominent are Benvenue and Ben-a'an, the sides of which are indented with picturesque ravines and wooded dells. The lake is fed by the numerous torrents which come down from the mountains, and it discharges its waters through the wild pass of the Trossachs to join Lochs Achray and Venacher, which flow into the Teith. About half-a-mile from the shore is Eilan Varnoch, to which the plunderers used to drive their booty, and which occupies a conspicuous place in the Lady of the Lake as Ellen's Isle. Since 1846 a steamer has plied upon the lake, for the convenience of tourists.