Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pen yr Allt Uchaf is a subsidiary summit of Aran Fawddwy in southern Snowdonia, North Wales, Wales, United Kingdom. The summit is the highest point on a ridge branching off to the west of Aran Fawddwy's south ridge. The summit is marked by a small cairn, and offers bird-eyes views of Cwm Cywarch. Close views of the steep south faces of Glasgwm, Gwaun y Llwyni and Aran Fawddwy are observed. Aran Fawddwy is a mountain in southern Snowdonia, Wales, United Kingdom.