Cairn situated on a prominent SW to NE aligned ridge of volcanic rock crossing the summit of Mynydd Rhiw. This is one of six cairns located on the mountain, this and four others (NPRNs 308047, 302261, 302262, 421096 ) are sited along the same ridge and the sixth (NPRN 302257) to the west.

The cairn comprises a spread of stone 12m in diameter, of which some material has fallen down the slope. The cairn stands up to 0.7m in height and is comprised sub-angular stones 0.2m to 0.4m in size. A small modern cairn has been constructed onto this cairn.

Louise Barjer, RCAHMW, July 2015

Sources:
OS495card; SH22NW2