Aran Fawddwy is a
mountain in southern
Snowdonia, Wales, United Kingdom. It is the only peak in Wales outside of North Snowdonia above 900m. The nearest urban centres to the mountain are
Dinas Mawddwy to the south,
Llanymawddwy to the southeast,
Llanuwchllyn on the shores of
Bala Lake to the north, and
Rhydymain to the west. On the eastern slopes of Aran Fawddwy is the small lake named Creiglyn Dyfi, the source of the
River Dyfi. Its sister peak is
Aran Benllyn at .