Doon, Loch

Lake in southwest Scotland, 5 km/3 mi south of Dalmellington, forming part of the border between East Ayrshire and Dumfries and Galloway unitary authorities. It lies nearly 210 m/689 ft above sea-level, and covers an area 10 km/6 mi long and 2 km/1 mi wide. The loch, dotted with several small islands, is enclosed by mountains, and contains salmon and trout. Its surplus waters have been diverted south to the River Ken to augment supply to the Galloway hydroelectric scheme.