Cefn yr Ogof
{{Short description|Hill in Conwy County Borough, Wales}}
{{Use dmy dates|date=April 2022}}
{{Use British English|date=August 2022}}
{{Infobox mountain
| name = Cefn yr Ogof
| photo = Cefn-yr-ogof_from_llanddulas.jpg
| photo_caption = Cefn-yr-Ogof from Llanddulas
| elevation_m = 204
| elevation_ref =
| prominence_m = 102
| prominence_ref =
| grid_ref_UK = SH916773
| topo = OS Landranger 116
| parent_peak = Mwdwl-eithin
| listing = HuMP
}}
Cefn yr Ogof is the highest point of the hill to the west of Gwrych Castle near Abergele and Llanddulas. Ownership of the hillside is divided into three categories; an area managed by Welsh National Resources on behalf of the National Assembly of Wales, private ownership including the land immediately around Gwrych Castle and the western slopes which are predominantly common land and therefore open access. It is 204 m (669 ft) high, with views towards the Clwydian Hills, Denbigh Moors, (Mynydd Hiraethog) Snowdonia, the Great Orme, Anglesey and the Dulas valley. The name refers to the caves located on the hill.
It has recently been promoted to HuMP status, having a prominence of over 100 metres.
Large parts of Cefn yr Ogof are designated an SSSI.
{{coord|53.28155|-3.62732|type:landmark_region:GB_source:enwiki-osgb36(SH916773)|display=title}}
{{clear|left}}
Category:Llanddulas and Rhyd-y-Foel
Category:Mountains and hills of Conwy County Borough
{{Conwy-geo-stub}}