What survives here is the eroded perimeter of a ringfort, the most common field monument in Ireland, built and occupied broadly during the early medieval period as a farmstead enclosed by one or more earthen banks. At Ballinlongig, that enclosure is still legible as a roughly circular platform on a gentle south-east-facing slope, measuring about 24 metres north to south and 27 metres east to west. The defining feature is a scarped edge, essentially a cut or trimmed bank, which survives to a height of around 0.75 metres with a width of approximately 2 metres. A faint inner lip, rising just 0.3 metres on the northern to south-eastern arc, hints at the original double-profile of the earthwork.

The condition of the monument tells its own quiet story. Cattle grazing the pasture over many generations have worn the scarp down considerably, and there is a noticeable dip on the south-south-eastern side, where the bank drops to roughly 0.35 metres across a stretch of about 8 metres. This kind of dip often marks a historic entrance point or a gap that livestock have widened over time. A dump of earth and stones sits in the north-eastern quadrant, the origin of which the survey notes record without further explanation. The site was recorded by Denis Power and uploaded to the archaeological inventory in August 2011, offering one of those careful, unadorned field observations that form the backbone of Irish heritage documentation.

The interior of the ringfort is level, under permanent pasture, and shaded by mature trees, which can make it easier to spot from a distance than many comparable sites. The trees also mean that the earthwork reads more clearly in winter or early spring, when the canopy is open and the low sun picks out the slight rise and fall of the ground surface. The site sits on private farmland, so access would require the landowner's permission. Anyone visiting with that permission should walk the perimeter slowly; the differences in height around the scarp, modest as they are on paper, become more apparent underfoot than they appear from the field edge.