Loch Katrine

Loch Katrine Loch Ceiteirein
Above Stronachlachar, looking eastward along the length of the loch
Loch Katrine Loch Ceiteirein
Location	Stirling area, Scotland
Coordinates	56°15′16″N 4°30′56″W / 56.25444°N 4.51556°W / 56.25444; -4.51556
Type	freshwater loch, reservoir
Primary outflows	Achray Water and Katrine aqueduct
Basin countries	Scotland
Max. length	13 km (8.1 mi)[1]
Max. width	1 km (0.62 mi)
Islands	Ellen's Isle, Black Isle, Factor's Isle or Island

Loch Katrine (listen^ⓘ; Scottish Gaelic: Loch Ceiteirein [l̪ˠɔx ˈkʲʰeʰtʲɪɾʲɛɲ] or Loch Ceathairne) 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 (Gaelic: Srath Ghartain). It is within the drainage basins of the River Teith and River Forth.

It is a popular scenic attraction for tourists and day-visitors from Glasgow and nearby towns; fly and boat fishing for trout are permitted on the loch from spring to autumn. It also serves as a reservoir for the water supply of the Glasgow conurbation, some 30 miles (48 km) south, being connected by two aqueducts constructed in 1859.

It is the fictional setting of Sir Walter Scott's poem The Lady of the Lake and of the subsequent opera by Gioachino Rossini, La donna del lago.