This cairn... featuring what I took to be remnants of a cist within... sits between Bryn Dinas and Allt Gwyddgwion (’No shit, Sherlock!’ I hear you exclaim), the latter the elongated south-western ridge of the wondrously be-cairned Trum Gelli. As such, be sure to pay a visit if heading for the western Tarrens, the monument a little to the right of the path – such as it is – when approaching from the main green track traversing these parts.
Coflein gives the dimensions thus:
“The cairn is 2 metres in diameter and 0.6 metres high. See survey report Tywyn Dolgoch, by M.J. Roseveare, ArchaeoPhysica Ltd.” RCAHMW, 14/12/2007