It is 610 metres (2,001 ft) high, and lies midway between the Conwy valley to the east and Penmaenmawr on the coast to the north-west. It is the most northerly 2000 ft summit in Wales.
On 6 May 2013 BBC News reported that a precise GPS measurement of Tal y Fan's height had been verified by the Ordnance Survey as 609.98 metres or 2,001 feet, confirming its status as a mountain.
Bwlch y Ddeufaen separates Tal y Fan from the main Carneddau ridge, the closest summit on which is Carnedd y Ddelw. Pen y Castell is directly opposite to the south.
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References
^Marsh, Terry. The Summits of Snowdonia (London: Robert Hale, 1984)
^Marsh, Terry. The Mountains of Wales (London: Hodder and Stoughton, 1985)
^Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN1-85284-304-7.