The name of Traeth Coch is believed to originate from a battle involving Vikings in 1170 that left the beach soaked in blood. A hoard of five Scandinavian type arm-rings was discovered at Red Wharf Bay between c. 1887 and c. 1894. Historian Mark Redknap wrote that "The Red Wharf Bay arm-rings are probably contemporary with the
Cuerdale Hoard (buried c. 905), and it's been suggested that
Ingimund’s activities on Anglesey in 903 might have led to the deposition and their non-recovery." There was once a railway line which terminated at the bay, the
Red Wharf Bay branch line, which left the
Anglesey Central Railway at
Pentre Berw. Stone for the
Admiralty Arch, Holyhead was quarried near the bay. ==References==