The Great Glen (Scottish Gaelic: An Gleann Mòr), also known as Glen Albyn or Glen More is a series of valleys in Scotland running 100 kilometres from Inverness on the Moray Firth to Fort William at the head of Loch Linnhe.The Great Glen follows a large geological fault known as the Great Glen Fault. It bisects the Scottish Highlands into the Grampian Mountains to the southeast and Inverness to