Cefn Eglwysilan, Mountain summit in Rhondda Cynon Taf, Wales.
Cefn Eglwysilan rises to 382 meters with twin summits, featuring a wireless transmission station on the primary peak and a triangulation point on the southern peak.
The eastern slope contains the Senghenydd Dyke, an ancient linear earthwork that marked boundaries of a 13th-century deer park connected to Caerphilly Castle.
The name originates from the nearby hamlet of Eglwysilan, where a church stands dedicated to Saint Ilan, reflecting Welsh religious heritage.
Multiple public byways cross the hill, connecting Eglwysilan Road with routes between Nelson and Senghenydd, providing various access points for visitors.
The geological formation consists of Hughes Sandstone from the Carboniferous Period, with underlying layers of siltstone and mudstone dating back 309 million years.
Location: Wales
Location: Rhondda Cynon Taf
Elevation above the sea: 382 m
GPS coordinates: 51.60612,-3.30521
Latest update: March 17, 2025 19:53
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