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glen (valley) south of Fort William in the Highland council area of western Scotland. From a relatively low watershed and pass to Glen Etive at an elevation of 1,011 feet (308 metres), Glencoe runs west for about 5 miles (8 km) as a steep-sided, glacier-scoured trough about one-half mile (800 metres) wide, bounded by towering mountains with elevations of 3,000 feet (900 metres) or more, before turning northwest as a broader glen opening into the valley of Loch Leven. In February 1692 it was the site of a treacherous clan massacre involving the Macdonalds of Glencoe. The glen is now almost completely uninhabited.