Trefignath Burial Chamber

Trefignath is a Neolithic burial chamber near Trearddur, south of Holyhead on Holy Island, off Anglesey in Wales. In its most complete form it included a large cairn covering three stone tombs, set on a small knoll. It was excavated between 1977 and 1979, revealing several phases of occupation with three separate burial chambers built in succession. It is a scheduled ancient monument, maintained by Cadw.

Trefignath is adjacent to an alignment of small standing stones which extends some 350 metres northwestwards. Beyond these, some 450 metres from Trefignath, is the larger Tŷ Mawr Standing Stone.