Cowal before it was the defended medieval homestead of the MacEwens; at first there was a palisaded enclosure, and then a promontory fort with a timber rampart. The remote areas in the north east of Cowal, which were theoretically under the dominion of Clan Lamont, were used by Scottish kings for hunting; indeed, Cowal was the last part of Britain to have wild boar. When King John Balliol was threatened by his rival, Robert de Bruys, Balliol's ally, the king of England, established Henry Percy at Carrick Castle, in the region; likewise Dunoon Castle further south. De Bruys expelled the English
Cowal the Kilfinan peninsula, and on the east, the Toward peninsula, which is also isolated from the north of Cowal, by the Holy Loch. The small central peninsula is divided from the Kilfinan peninsula by Loch riddon, and the interjection of Bute, and its Kyles. Cowal's underlying geology is made up largely of resistant metamorphic rocks, but south of the Highland Boundary Fault part of the Toward peninsula is composed of sedimentary rocks. The landscape is mountainous, the high ground dominated by moorland, peat mosses and the forest that often extends down the sides of the sea lochs to the water's