Loch Long

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This article is about the loch in Argyll and Bute. For the wooden sailing yacht design, see Loch Long One Design. For the Loch Long in Kintail, adjacent to Eilean Donan Castle and Loch Duich, see Loch Long (Highlands).
Loch Long
Looking down Loch Long from the torpedo testing facility. The houses to the left are at Ardmay.
Location Cowal, Argyll and Bute, Scotland
Type Sea Loch
Basin countries Scotland, United Kingdom
Surface area sq. metres
Water volume cubic metres
Surface elevation metres
Loch Long
Looking across Loch Long to Ardentinny

Loch Long (Gaelic for Ship Lake, Long being the word for ship) is a body of water in Argyll and Bute, Scotland. The Sea Loch extends from the Firth of Clyde at its southwestern end. It measures approximately 20 miles (32 km) in length, with a width of between 1 and 2 miles (1.6 and 3.2 km). The loch also has an arm, Loch Goil, on its western side.

Loch Long forms part of the coast of the Cowal Peninsula.

Loch Long was historically the boundary between Argyll and Dunbartonshire. However, in 1996 boundary redrawing meant that it moved wholly within the council area of Argyll and Bute.

The loch was used as a testing ground for torpedoes during World War II and contains numerous wrecks. It is now a popular area for sport diving. The Ardentinny Outdoor Education Centre (on the other bank) also uses the loch for watersports.

Several Scottish sea fishing records are attributed to the loch:

Species Weight Angler / Date
Argentine 00-05-03 I. Miller, 1978 (Boat)
Herring 01-02-00 R. C. Scott, 1974 (Boat)
Rockling, Shore 00-14-08 A. Glen, 1982 (Shore)

The Finnart Oil Terminal is located on the eastern shore of the loch, linked to the Grangemouth Refinery via a 58 miles (93 km) long pipeline.[1] The eastern shore is also the location of the Royal Navy's Coulport Armament depot, part of HMNB Clyde, and the Glen Mallan jetty, linked to Glen Douglas defence munitions depot.

Important villages on the loch include Arrochar at its head and Cove on the east shore near its foot.

The loch forms the entire western coastline of the Rosneath Peninsula.

Coordinates: 56°04′19″N 4°52′05″W / 56.072°N 4.868°W / 56.072; -4.868


  1. ^ Fullarton, Donald (29 July 2011). "Americans built oil terminal". Helensburgh Heritage. Retrieved 23 May 2013. 

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