Strathmore (the Great Glen) forms a wide valley between the southern Grampians and the Sidlaw Hills, extending from Perth in the south-west to Stonehaven in the north-east and including the districts in the north-east known as the Mearns and the Howes of Angus.
Its principal rivers are the Tay, Isla, Dean Water, North Esk and South Esk, and its chief settlements include Perth, Coupar Angus, Blairgowrie, Forfar, Brechin, Kirriemuir, Alyth, Laurencekirk and Stonehaven.
In some contexts, Strathmore is described as extending as far south-west as Dunbartonshire, following the Highland Boundary Fault and effectively designating the south-eastern frontier of that area of the Highlands bounded in the north-west by another Great Glen.
Glamis Castle is the seat of the Earls of Strathmore.
Strathmore, Vale of Strathmore, The Great Glen