It is easy to miss, partly because a later field boundary has been laid directly over the bank along its western and northern arc, folding the ancient into the agricultural, so that something built perhaps a thousand or more years ago now quietly doubles as a modern property line.

This is a rath, the most common type of ringfort found across Ireland. A rath typically consists of a roughly circular earthen bank, sometimes with an accompanying ditch, enclosing a space that would once have served as a farmstead for an early medieval family, protecting livestock and household alike. The example at Slihaun Beg is subcircular rather than perfectly round, measuring approximately 31 metres on its north-northeast to south-southwest axis and just under 30 metres the other way. Its condition is described as fair, which, given the overlap with a working field boundary, is perhaps unsurprising. A possible entrance can be identified on the eastern side, which is consistent with the eastern-facing orientation seen in many Irish ringforts, possibly related to the rising sun or simply to prevailing practicalities of the landscape. What adds a particular layer of interest here is the proximity of a second ringfort, catalogued separately, sitting approximately 220 metres to the north. Paired or clustered ringforts like this occasionally reflect related family groups or sequential occupation of the same general territory, though in this case the precise relationship between the two remains a matter of inference rather than excavation.