Aran Fawddwy is a Hewitt of 905.6 m in Gwynedd. Nothing higher stands within 40.5 km; the nearest higher summit is Crib Goch (923.9 m), to the north-west.
Only six of the register's Wales hills are higher. It is also on the county tops list, as the highest point of its historic county. In the database's Bala to Welshpool region it is the highest of five register hills, above Cadair Berwyn and three others. It counts towards four lists: Hewitts, Nuttalls, Marilyns and county tops. Its drop of 672.8 m is 74% of its height: the col linking it to higher ground is only 232.8 m above sea level. It overtops all four of its nearest neighbours; the tallest of them, Glasgwm, reaches 779.5 m. It stands 235.7 m above its nearest neighbour, Esgeiriau Gwynion, 2.9 km to the north-east. The summit is marked by a trig point. It falls on two OS 1:50,000 sheets, 124 and 125.
