Eilean Ruairidh Mòr is a forested island in Loch Maree, Wester Ross, Scotland.

[5] The island is owned by Forestry and Land Scotland, as is the Slattadale Forest on the southern shore of Loch Maree.

[4] The islands in Loch Maree are among the least disturbed in Britain and are managed as a national nature reserve.

There are remains of a subterranean circular structure,[5] similar to a Scandinavian dùn or burgh.

The ancestors of the Mackenzies of Gairloch held it as a place of security from the attacks of the Macleods.