Loch Lyon

Loch Lyon (Scottish Gaelic, Loch Lìobhann)^[3] is a freshwater loch in Glen Lyon, located in Perthshire, Scotland, which feeds the River Lyon, a tributary of the River Tay.^[1][2] Loch Lyon lies in Glen Lyon, that is the longest enclosed Glen in Scotland, stretching over 30 miles (50 kilometres) from Fortingall in the east to Loch Lyon in the west. Sir Walter Scott described Glen Lyon as the longest, loneliest and loveliest glen in Scotland.^[4]

Loch Lyon
Loch Lyon from An Grianan. Beyond the loch the highest hill is Beinn Dorain.
Loch Lyon
Location	Glen Lyon, Perth
Coordinates	56.540800°N 4.568°W / 56.540800; -4.568
Type	freshwater loch, reservoir
Primary outflows	River Lyon
Basin countries	Scotland
Max. length	2.81 km (1.75 mi)[1]
Max. width	0.40 km (0.25 mi)[1]
Surface area	492.3 ha (1,216 acres)[2]
Average depth	25 ft (7.6 m)[1] before construction of dam.
Max. depth	100 ft (30 m)[1] before construction of dam.
Shore length1	21.2 km (13.2 mi) [2]
Surface elevation	344 m (1,129 ft)[2]
1 Shore length is not a well-defined measure.

Reservoir

The original natural loch was much expanded by a hydro-electric dam, part of the North of Scotland Hydro-Electric Board's Breadalbane scheme.