Loch Katrine is a freshwater loch in the Trossachs area of the Scottish Highlands, east of Loch Lomond, within the historic county and registration county of Perthshire and the contemporary district of Stirling. The loch is about 8 miles (13 km) long and 1 mile (1.6 km) wide at its widest point, and runs the length of Strath Gartney. It is within the drainage basins of the River Teith and River Forth.
Above Stronachlachar, looking eastward along the length of the loch
Loch Katrine by Alexander Nasmyth, 1810
Stronachlachar from Loch Katrine with Factor's Isle in the foreground.
Plaque commemorating the Glen Finglas expansion of Loch Katrine waterworks, completed in 1958
The Trossachs generally refers to an area of wooded glens, braes, and lochs lying to the east of Ben Lomond in the Stirling council area of Scotland. The name is taken from that of a small woodland glen that lies at the centre of the area, but is now generally applied to the wider region.
The forested area at the eastern end of Loch Katrine
John Ruskin painted at Glenfinlas in the Trossachs by John Everett Millais in 1853–54.
Ben Venue and Achray Forest in the southern park of the Great Trossachs Forest.
Ben Ledi seen from Kilmahog.