The trees are the giveaway, a rough circle of growth that betrays the earthwork beneath, visible even on aerial photography as a dark collar around the summit. A second ringfort sits roughly 165 metres to the south-south-east, suggesting this quiet patch of midlands farmland was once a place of some significance, populated by enclosures that would have housed farming families, their livestock, and their stores during the early medieval period.

A ringfort, or rath, is essentially a circular or oval enclosure defined by one or more earthen banks and ditches, serving as a defended farmstead for much of the first millennium AD. The Ballyowen example was recorded on the revised 1913 Ordnance Survey 25-inch map as a roughly circular, tree-planted earthwork, and by the time it was formally described in 1970, it had already begun to surrender its original shape to the landscape. What survives is a broad oval interior of about 29 metres in diameter, enclosed by an inner bank, an intervening fosse (a defensive ditch, typically dug to supply material for the bank above it), and a lower outer bank. The inner bank has been reduced in places almost to a simple scarp, a slumped edge rather than a standing wall, and on the eastern side a modern field fence has been constructed directly on top of it, quietly cannibalising the ancient boundary for agricultural use. A slight gap in the inner bank and a low causeway just outside it are thought to represent the original entrance.

The interior slopes gently eastward and is pitted with shallow hollows, including one large irregular depression in the northern quarter. These disturbances appear to be relatively recent in origin rather than evidence of ancient activity, which is a common complication at sites that have spent centuries in working farmland. What the hillock does preserve, despite all of this, is its commanding position. The views in every direction are broad and unobstructed, a reminder that wherever exactly the ringfort's occupants chose to build, they chose deliberately.