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.