Loch Lomond is a freshwater loch lying on the Highland Boundary Fault, the boundary between the western lowlands of Central Scotland and the southern 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 (120 ft), and a maximum depth of about 190 metres (620 ft). Its surface area measures 71 km2 (27 sq mi), and it has a volume of 2.6 km3 (0.62 cu mi). Of all 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 by Lough Neagh in Northern Ireland only.

Traditionally a boundary of Stirlingshire and Dunbartonshire, Loch Lomond is located in the current council areas of Stirling, Argyll and Bute, and West Dunbartonshire, and its southern shores lie approximately 23 kilometres (14 mi) north of Glasgow, the country's largest city.

Tarbet (Scottish Gaelic: An Tairbeart (in full Tairbeart Loch Laomainn)) is a small village in Argyll and Bute, Scotland.

Traditionally on the northern fringes of the historic County of Dunbarton, it is on the banks of Loch Lomond, and has a pier. It stands on an isthmus where Loch Long and Loch Lomond come close. The village of Arrochar stands at the head of Loch Long, at the other side of the isthmus. Arrochar and Tarbet railway station, on the West Highland Line, stands between them.

Its name comes from the Scottish Gaelic word for isthmus, although Tarbert is the more common anglicization, and Tarbat also exists. Tarbet can be found on the west shore of Loch Lomond. Tarbet is traditionally known as a junction village, characterised by the main junction where the Tarbet Hotel is situated. It is well known for the pleasure cruises available from the pier (the name Tarbet is derived from the Gaelic Tairbeart meaning 'draw boat').

Luss will be familiar to anyone who has seen the TV Soap "Take the High Road". Many of the cottages that distinguish Luss were originally erected to house workers in the cotton mill and slate quarries of the 18th and 19th centuries. The homes have been fully restored and Luss has been designated a "Conservation Village".

On early records the village was known as Clachan Dubh, (the dark village) because of its mountain setting, giving two hours less sunlight in the evenings, particularly in the winter time.

The name Luss is considered by some to be derived from the Gaelic "Lus", a plant, although others have suggested that it comes from the French "Luce", a lily. Several stories exist about the derivation of the present name. One related to that of the Baroness MacAuslin, who died in France, whilst her husband was fighting at the siege of Tournay. Her body was brought back to Luss covered with flowers, especially the fleur-de luce. Some of the flowers grew to the surface of the grave " and became miraculously efficacious in staying a pestilence then raging through the countryside".