Y Garn is a mountain in Snowdonia, North Wales, part of the Glyderau.

It is one of the Welsh 3000s — the 15 summits in Wales over 3,000 feet (914.4 metres) in height.

Moderate snow accumulations can take place on the western-sloping side of the mountain from October to May.

The south-westerly side of the mountain slopes gently down to the Nant Peris valley.

The other, north-easterly side is of a different character, consisting of two steep-sided cwms, Cwm Clyd and Cwm Cywion, and finally Llyn Idwal and Ogwen Cottage.