This is a bowl-barrow, a type of Bronze Age funerary monument consisting of a low circular mound typically encircled by a shallow surrounding ditch. The ditch here is only around 1.5 metres wide and survives as little more than a faint depression, most legible on the south-south-western side. The mound itself measures roughly 3.4 metres north to south and 3.5 metres east to west, making it a notably modest example of a monument class that was once invested with considerable ritual significance.

When David McGuinness examined the site in 2012, it was so thoroughly overgrown with nettles that the ditch could only be guessed at from the vegetation apparently following its line, and the height of the mound could not be measured at all. That combination of low relief and dense plant cover makes it a good illustration of how much prehistoric landscape survives in Ireland not as dramatic ruin but as subtle, easily overlooked contour. What gives the site its particular interest is its relationship to its neighbours. A large cairn or tumulus lies just 10 metres to the east-south-east, a second small barrow sits 8 metres to the south-west, and a further bowl-barrow lies to the north-east. The monument under discussion appears to fall on a rough alignment connecting that larger tumulus to the bowl-barrow to its north-east, which raises the possibility that the grouping on Frewin Hill was laid out with some deliberate spatial logic, whether as a ceremonial complex or a place of repeated burial over time.

The western edge of the summit drops away sharply, a topographic detail the site shares with the small barrow immediately to its south. Visitors approaching from that direction would find the ground falling steeply underfoot before the summit levels out, which may partly explain why these monuments were placed where they are, commanding the high ground while remaining sheltered from view at lower elevations.