Easily accessed from the nearby single-track road, I wasn’t sure what to make of this, to be honest. ‘Ring cairn’, heavily denuded round cairn... or even an ‘enclosure’ of some description? In my defence, Coflein would appear to be in a similar dilemma:
“A rough circular bank of stones, c.17.5m in diameter, having an OS triangulation pillar at its centre.” [RCAHMW AP965050/66. J. Wiles 30.09.03]
Whatever the truth, the 360-degree views are extensive, the skies massive. However, given the abundance of other sites in the locale, this is (arguably) not somewhere to linger for that long... but nevertheless worth checking out.