Finlas, a lake in Straiton parish, Ayrshire, 5 miles S by W of Dalmellington. Lying 840 feet above sea-level, it extends 1½ mile from NW to SE, has a varying width of ¼ furlong and 2¾ furlongs, is fed from Loch Derclach at its head, and from its foot sends off Garpel Burn 1½ mile north-eastward to Loch Doon. Boats are kept on it, and the trout fishing is good.-Ord. Sur., sh. 8, 1863.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)