Location: West Dunbartonshire/Argyll and Bute/Stirling, Scotland
Coordinates: 56°05′N 4°34′WCoordinates: 56°05′N 4°34′W
Type: Freshwater loch, ribbon lake, dimictic
Primary inflows: Endrick Water, Fruin Water, River Falloch
Primary outflows: River Leven
Catchment area: 696 km2 (269 sq mi)
Basin countries: Scotland
Max. length: 39 km (24 mi)
Max. width: 8 km (5.0 mi)
Surface area: 71 km2 (27 sq mi)
Average depth: 37 m (121 ft)
Max. depth: 190 m (620 ft)
Water volume: 2.6 km3 (0.62 cu mi)
Surface elevation: 7.6 m (25 ft
Islands: 60, inc. Inchcailloch, Inchmurrin, Inchfad
Settlements: Balloch, Ardlui, Balmaha, Luss, Rowardennan, Tarbet
Loch Lomond (Scottish Gaelic Loch Laomainn) is a freshwater Scottish loch which crosses the Highland Boundary Fault. It is the largest inland stretch of water in Great Britain by surface area.The loch contains many islands, including Inchmurrin, the largest fresh-water island in the British Isles.<ref> Worsley, Harry (1988). Loch Lomond: The Loch, the Lairds and the Legends (Glasgow: Lindsay Publications) 5</ref> Loch Lomond is a popular leisure destination.
Loch Lomond is a freshwater loch lying on the Highland Boundary Fault, often considered the boundary between the lowlands of Central Scotland and the Highlands. It is 39 kilometres (24 mi) long and between 1.21 kilometres (0.75 mi) and 8 kilometres (5.0 mi) wide. It has an average depth of about 37 metres (121 ft), and a maximum depth of about 190 metres (620 ft). Its surface area is 71 km2 (27 sq mi), and it has a volume of 2.6 km3 (0.62 cu mi). Of all lochs and lakes in Great Britain, it is the largest by surface area, and the second largest (after Loch Ness) by water volume.
Within the United Kingdom, it is surpassed only by Lough Neagh and Lower Lough Erne in Northern Ireland and regarding the British Isles as a whole there are also several larger loughs in the Republic of Ireland. Traditionally a boundary between Stirlingshire and Dunbartonshire, Loch Lomond is currently split between the council areas of Stirling, Argyll and Bute, and West Dunbartonshire. Its southern shores are about 23 kilometres (14 mi) north of Glasgow, Scotland’s largest city. Loch Lomond is now part of Loch Lomond and the Trossachs National Park. Ben Lomond is on the eastern shore: 974 m (3,195 ft) in height and the most southerly of the Munro peaks. The main arterial route along the loch is the A82 road which runs the length of its western shore. For a long time this was a notorious bottleneck, with the route clogged with tourists during the summer months. It was upgraded in the 1980s and 1990s, although the stretch north of Tarbet remains unimproved.
From the summit of the island of Inchcailloch to Torrinch, Creinch, Inchmurrin and Ben Bowie See also: List of Islands in Loch Lomond The loch contains thirty or more other islands.[Note 1] depending on the water level. Several of them are large by the standards of British bodies of freshwater. Inchmurrin, for example, is the largest island in a body of freshwater in the British Isles. As in Loch Tay, several of the islands appear to be crannogs, artificial islands built in prehistoric periods.