Eilean Mòr is an uninhabited, tidal island opposite Oronsay at the entrance to Loch Sunart, an arm of the sea on the west coast of Scotland.[2] At low tide it is attached to Glenmore on the Ardnamurchanpeninsula. The highest elevation is 123 feet (37 m). At low tide it is attached to Glenmore on the Ardnamurchanpeninsula. The water around Eilean Mòr contains flame shells.[3]