What makes the site quietly compelling is not just what is visible but what has been absorbed into the working landscape around it: a later field fence at the north-western arc of the enclosure has been built directly into the old earthwork, faced with stone to a height of 1.4 metres, so that centuries of agricultural use have become structurally entangled with something far older.

The site is a rath, the Irish term for a roughly circular earthen enclosure, typically dating from the early medieval period and associated with farmstead settlement. This example measures approximately 29 metres north to south and 24 metres east to west, defined by a scarp, a slope rather than a built-up bank, with a domed interior that rises at its centre before falling away towards the edges. A field fence on the north-eastern to western side follows the curve of the rath so closely, with only a gap of about four metres between them, that it may itself preserve the line of an original outer bank. Inside, the western half contains a low sod-covered stony rise curving in a shallow arc, and a separate linear stony feature extending across the interior; in the north-eastern quadrant, a small heap of earth and stones adds further texture. The purpose and date of these internal features remain uncertain. Roughly 100 metres to the south-east lies a second rath, which suggests this part of Ballinlag was once a more densely settled area than the empty pasture now implies.

Access is across working farmland, and the interior is increasingly difficult to read on the ground, with brambles and blackthorn scrub encroaching across much of the surface. The hawthorn growing along the enclosing field fence is in keeping with a long Irish tradition of such plants marking old boundaries, whether by design or by the simple fact that no one cuts them down.