The Quinag mountain in Sutherland, in the Scottish Highlands, is a range of hills with an undulating series of peaks along its Y-shaped crest. The name Quinag is an anglicisation of the Gaelic name Cuinneag. Geologically, Quinag is made of Torridonian sandstone, resting on a substrate of Lewisian gneiss.

Quinag boasts three separate Corbett summits – Sàil Ghorm (Blue Heel), Sàil Gharbh (Rough Heel) and Spidean Coinich (Mossy Peak). From the north and from the road crossing the Kylesku Bridge, Quinag presents a formidable sight with its two huge buttresses of Sàil Gharbh and Sàil Ghorm dominating the skyline. It provides a backdrop to Loch Assynt, and seen from the road coming from the village of Lochinver, Quinag stretches as far as the eye can see. Spidean Coinich projects a broad south-east ridge which provides the usual ascent route.