Bryn Euryn (Welsh: [ˈɛirɪn]; /ˈɛərɪn/ AYR-in) is a hill which is a Site of Special Scientific Interest in Conwy County Borough, Wales.[1] There is a trig point at the summit. It lies above the seaside town of Rhos-on-Sea and village of Mochdre, Conwy. It is 131 metres (430 feet) above sea level, and is listed as a HuMP. At the bottom of the hill are the remains of Llys Euryn.

View towards Bryn Euryn


The site commands extensive views of the Conwy Valley and coast, and was once the location of a hillfort, which was initially excavated in the autumn of 1997 for the Gwynedd Archaeological Trust. The excavations revealed a "massive, well-built" wall formed from quarried limestone, believed to have once been 3 m (9.8 ft) high and to have been fronted by 3.5 m (11 ft) of rubble. There were no archaeological discoveries permitting a certain identification, but the pre-Norman layout led David Longley, the study's director, to connect it with the early-6th century king of Rhos Cynlas the Red on the basis of the "Bear Den" (Latin: receptaculi ursi) mentioned in Gildas's passage on him and the surviving local name of the area as Dinerth (Old Welsh: Din Eirth, "Fort Bear").[2][3]

The hilltop was used again in World War II first as an observation post by the Home Guard; it was then used by the RAF as one of the first radar posts used to detect German bombers heading to Liverpool.[3]

Bryn Euryn summit

See alsoEdit


  1. ^ Grid reference SH832798
  2. ^ "Welsh fort identified as citadel of Dark Age king". British Archaeology, no 29. Council for British Archaeology. November 1997. Archived from the original on 9 January 2015. Retrieved 31 December 2012.
  3. ^ a b Reid, Ian (February 2009). "Rhos-on-Sea Heritage Trail". BBC. Retrieved 31 December 2012.

Coordinates: 53°18′10″N 3°45′12″W / 53.30269°N 3.75344°W / 53.30269; -3.75344