 The east coast is rugged and mountainous, rising steeply from the Sound of Islay, the highest peak being Beinn Bheigier, which is a Marilyn at 1,612 feet (491 m).The western peninsulas are separated from the main bulk of the island by the waters of Loch Indaal to the south and Loch Gruinart to the north.The fertile and windswept southwestern arm is called The Rinns, and Ardnave Point is a conspicuous promontory on the northwest coast.