Beinn Trilleachean (840 m) is a mountain in the Grampian Mountains, north of the village of Taynuilt at the head of Loch Etive.

It lies on the border of Highland and Argyll and Bute in Scotland.

A very rocky peak, it is best known for the rock climbing opportunities on the slabs above Loch Etive, which are known as the 'Etive Slabs'.

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