Towards the middle of the island lies Loch Fada, nearly 2 m.
Loch Laggan and Loch Ericht are the principal lakes, and the district is abundantly watered by the Spey and its numerous tributaries.
It is fed by the Gyle and numerous burns, and drained by the Achray to Loch Achray and thence by the Black Avon to Loch Vennacher.
During summer steamers ply between the Trossachs and Stronachlachar and there is a daily service of coaches from the Trossachs to Callander (about io m.) and to Aberfoyle (9 m.), and between Stronachlachar, to Inversnaid on Loch Lomond (about 42 m.).