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Diffwys and Crib-y-rhiw from Y Llethr
Highest point
Elevation 750 m (2,460 ft)
Prominence 148 m (486 ft)
Listing sub Marilyn, Hewitt, Nuttall
Location Gwynedd, Wales
Parent range Rhinogydd
OS grid SH661234
Topo map OS Landranger 124
Listed summits of Diffwys
Name Grid ref Height Status
Diffwys West Top 642 metres (2,106 ft) sub Hewitt, Nuttall

Diffwys is a mountain in Snowdonia, North Wales, near Barmouth and forms part of the Rhinogydd. On the north side is an exposure of the Caerdion Syncline. It is technically a subsidiary summit of Y Llethr, missing Marilyn status by 2m. It is therefore like Rhinog Fach a sub Marilyn.

The summit has a trig point. To the north is Y Llethr and Crib-y-rhiw, to the east is Y Garn, to the south is Cadair Idris, and to the west is its top Diffwys West Top.[1]


  1. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.

External links[edit]

Coordinates: 52°47′29″N 3°59′14″W / 52.79151°N 3.98716°W / 52.79151; -3.98716