Y Garn is a Hewitt of 629 m in Gwynedd. All four of its nearest neighbours are higher, up to Y Llethr at 755.1 m.
It sits below Y Llethr, only 5.0 km to the north-west and 126.1 m higher. On the Hewitts height ladder it sits between Starling Dodd (633 m) and Yewbarrow (628.7 m). Its nearest higher summit, Diffwys (750.4 m, 4.2 km west), is a listed top not profiled here.