A ringfort, or rath, was a circular earthen enclosure, typically built during the first millennium AD to enclose a farmstead and its occupants, defined by a raised bank and an outer ditch called a fosse. Here, that structure has been ploughed and grazed to near-invisibility, leaving only a faint scarp rising no more than 25 centimetres above the surrounding pasture to the south and north-north-east, and a subtle difference in grass growth tracing where the bank once ran to the west and north.

The enclosure appears on Ordnance Survey six-inch maps as far back as 1842, marked as a hachured circle roughly 30 metres across, with a lime kiln noted on its southern bank. A lime kiln was a simple stone furnace used to burn limestone and produce agricultural lime, and its presence on the bank of the fort suggests the structure was already being treated as convenient raw material or waste ground by the nineteenth century. The same circular feature reappears on the 1904 and 1937 OS editions, though even then the eastern side was being cut into by a roadway. Aerial photography has since confirmed what surface inspection can only suggest: the bank and fosse show clearly as a cropmark, with the road to the east visibly truncating the outer ditch. The enclosure, measured from the air, runs to around 32 metres in diameter.