Loch Ailsh
Loch Ailsh from its south shore, with Ben More Assynt in the background
Loch Ailsh
Location	Scottish Highlands
Coordinates	58°03′18″N 4°51′25″W / 58.05500°N 4.85694°W / 58.05500; -4.85694
Primary inflows	River Oykel, Allt na Cailliche
Primary outflows	River Oykel
Basin countries	Scotland, United Kingdom
Max. length	1.46 km (0.91 mi)
Max. width	1.42 km (0.88 mi)
Surface elevation	150 m (490 ft)

Loch Ailsh is a freshwater loch in Sutherland, Scotland, located 2.6km northeast of the A837. It sits on the River Oykel among plantation woodland.

The loch's name likely derives from the same Scottish Gaelic root as Loch Alsh, Loch Aillse, meaning "foaming lake".

Benmore Lodge, a holiday cottage, sits on a sandy beach at the loch's northeast end.^[1] A chambered cairn, dating from the Neolithic period, lies just south of the loch, on the west bank of the River Oykel.^[2]

Loch Ailsh is a Site of Special Scientific Interest and one of the Scottish Environment Protection Agency's designated protected areas, meaning any fish caught on the loch must be returned. It is a key breeding site for the UK's population of black-throated diver.^[3]

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