An irregular and apparently much ruined cairn, 24.5m by 23.5m and 0.5-0.8m high, set in a valley bottom location above the confluence of Afon Efyrnwy and the stream that drains from Llyn Coethlyn to the W.
An oral tradition is recorded of ruinous buildings, including an entrance or porch, and a cist, being cleared from here and a burial, hammer and "14 pieces of money" being found.
(source Os495card; SJ01SW1)
J.Wiles 24.09.02