Tal y Fan is a Hewitt of 610 m in Conwy. It clears the 2,000 ft line (609.6 m) by only 0.4 m.
Its closest neighbour in this register, Carnedd Llewelyn, is 9.4 km away. All four of its nearest neighbours are higher, up to Carnedd Llewelyn at 1,061.8 m. It sits below Carnedd Llewelyn, only 9.4 km to the south-west and 451.8 m higher. Only two of the 56 hills profiled in Wales are lower. All four of its nearest neighbours lie to the south, so it stands at the northern edge of its group. It is the lowest of the 20 register hills in the Snowdonia region, where Snowdon – Yr Wyddfa is highest. On the Hewitts height ladder it sits between Corcogemore (610.1 m) and Calf Top (609.6 m). Its nearest higher summit, Carnedd y Ddelw (686 m, 3.0 km south-west), is a listed top not profiled here. The summit is marked by a trig point.
