What makes it worth pausing over is the combination of features still legible in the landscape: two banks with a fosse, the ditch dug between them, enclosing a space roughly 32.5 metres across, and somewhere beneath the interior, a probable souterrain. A souterrain is an underground stone-lined passage or chamber, typically associated with early medieval ringforts and used variously for storage, refuge, or ventilation of a nearby dwelling. The fact that one may lie beneath this particular site adds a subterranean dimension to what already occupies a commanding, if modest, elevation.

Ringforts, or raths, are among the most common archaeological monument types in Ireland, with tens of thousands recorded across the country, most of them dating to the early medieval period, roughly between the fifth and twelfth centuries. They served as enclosed farmsteads, the banks and ditches less a military fortification than a boundary marking status, keeping livestock in and wolves or neighbours out. The Knockroe example is described in a reference as far back as Neary's 1914 survey, which catalogued it among a numbered sequence of local monuments, suggesting it was already a recognisable feature of the landscape well over a century ago. The earthwork is in fair condition, though the inner bank has largely given way to a scarp, a slope rather than a raised bank, except at the northern arc where the original profile remains more distinct. An entrance gap at the eastern side is still apparent, orientations that are common in Irish ringfort design.