The thickets have grown so dense, exceeding two metres in height, that the enclosure is effectively sealed on most sides, its original form preserved less by any deliberate protection than by the simple fact that nothing can get in or out. The only breach is a cattle path at the north-east, worn through the thorns by animals rather than by any archaeological intent.

The enclosure sits on a low limestone ridge amid level, unimproved pasture, and its outline was still clear enough to be recorded on the 1921 edition of the Ordnance Survey six-inch map. An enclosure of this type, a roughly circular area defined by a raised earthen bank, is a form found widely across Ireland and generally associated with early medieval settlement, though the Knockadoon example has not been dated precisely. What survives of the bank at the north-east, where it is most accessible, is modest but legible: the internal face rises about 0.2 metres, the external face slightly more at 0.3 metres, and the bank itself is nearly 7.6 metres wide at its base, tapering to 2.6 metres at the top. A later drystone wall, marking the townland boundary, appears to have been built directly on top of the enclosing elements along the southern, western, and northern stretches, which partly explains why those sections are harder to distinguish.

The cattle path at the north-east offers the only practical way into the interior, where a small clearing opens up among young thorn saplings. The bank is most clearly visible in cross-section here, making this corner the most informative point for anyone trying to read what remains of the structure. The surrounding pasture is unimproved, meaning the broader landscape around the site retains something of the open, uninterrupted quality that makes the thicket-covered ridge stand out.