At Riverdale in County Westmeath, what was once a subcircular earthwork roughly 35 metres across has been swallowed so thoroughly by the modern agricultural landscape that its most legible form today is a faint oval cropmark visible only on aerial photography. Cropmarks appear when buried or levelled earthworks affect how crops or grass grow above them, producing subtle differences in colour or height that become readable from above, particularly in dry conditions. That this is now the clearest way to perceive the site says something about the pace at which early medieval enclosures have quietly disappeared from the Irish countryside.

The 1913 revised Ordnance Survey 25-inch map still recorded the earthwork as a recognisable subcircular feature. By 1970, when the site was formally described, it had already become a much-disturbed, roughly circular area enclosed by a low scarp, a term referring to a steep or abrupt slope in the ground surface that marks the former edge of the bank. Part of that scarp had been incorporated into a modern field fence along the south-west, and another fence ran along the base of the scarp from the east-south-east around to the south-south-east. There was no trace of an external fosse, the ditch that typically runs outside a ringfort bank, and no entrance feature could be identified. By 1980, the assessment was starker: the monument was described as completely levelled, with only a very slight rise of ground and vague traces of the scarp still visible from the north and east. The site sits on a gentle rise amid level pasture, with open views in all directions, which would have made it a well-chosen location for an enclosed farmstead of the early medieval period, when ringforts served as the basic unit of rural settlement across Ireland.

The monument survives on the slight elevation it always occupied, but there is little to see at ground level. The field boundaries that absorbed the remains are still present, and the faint topographic rise noted in earlier surveys may still be perceptible to an attentive eye, though the earthwork itself no longer reads as a distinct form in the landscape.