This is a rath, the most common type of early medieval enclosure in Ireland, typically built between roughly 500 and 1000 AD as a defended farmstead for a single family or small community. What makes this one worth a second look is the precision with which its form has survived: the bank, the ditch, even the slight distortion caused by a later fieldbank cutting across the northern edge, all of it still legible in the ground.

The enclosure is roughly circular, measuring 33 metres north to south and 36 metres east to west. It is univallate, meaning it has a single enclosing bank rather than the double or triple rings that sometimes indicate higher status. That bank averages about five metres wide, stands around 1.2 metres above the exterior ground level, and drops to about 0.8 metres on the interior side. Just outside the bank runs a fosse, a term for a defensive ditch, here U-shaped in profile, between one and four metres wide and roughly a metre deep. The variation in the fosse's width suggests the ground conditions changed as it was dug, or that it was never entirely uniform to begin with. A V-shaped fieldbank, the kind of boundary feature built centuries later as the land was parcelled up for agriculture, clips the northern arc of the earthwork, a small but telling sign of how later farming activity has slowly encroached on these older structures across the Irish countryside.