City of Stirling

The town is situated at the base of Craigmore (1,271 foot/387 metres high) and on the Laggan, a head-water of the River Forth. Since 1885, when the Duke of Montrose constructed a road over the eastern shoulder of Craigmore to join the older road at the entrance of the Trossachs pass, Aberfoyle has become the alternative route to the Trossachs and Loch Katrine; this road, known as the Duke's Road or Duke's Pass, was opened to the public in 1931 when the Forestry Commission acquired the land. It also shows the emplacement of Arenig carbonates onto serpentinites.

Loch Ard, about two miles (3 km) west of Aberfoyle, lies 105 feet (32 m) above the sea. It is three miles (5 km) long (including the narrows at the east end) and one mile (1½ km) broad. Towards the west end is Eilean Gorm (the green isle), and near the north-western shore are the falls of Ledard. Two miles northwest is Loch Chon, at 90 feet (27 m) above the sea, 1¼ miles (2 km) long, and about half a mile broad. It drains by the Avon Dhu to Loch Ard, which is drained in turn by the Laggan.