What was once a raised earthwork, around 20 metres in diameter, has been reduced over time to the faintest of impressions, legible now mainly from the air, where it shows up as a cropmark, a phenomenon where buried or levelled features cause overlying vegetation to grow slightly differently, revealing outlines invisible at ground level. The monument at Mountblakeney is, in other words, more ghost than structure.

The earthwork was recorded as recently as the mid-nineteenth century. The 1840 edition of the Ordnance Survey Ireland six-inch map shows it as a clearly defined circular feature, and by the 1897 edition of the 25-inch map it was still visible as a raised circular area defined by a scarp, the term for a steep slope or near-vertical face that marks the edge of an earthen platform or enclosure. At that point it retained a recognisable form. Subsequent agricultural activity, most likely the same land reclamation that shaped the surrounding pasture, has since levelled much of it. A trackway running northeast to southwest intersects the monument at its southwestern edge, which may itself have contributed to the gradual erosion of the site. A formal site inspection carried out on 3 May 2022 by Anne Carey, Archaeologist with the National Monuments Service, found that only the southern side preserves any hint of the original scarp. She recorded a curving arc of low ground, running east to west, approximately 3 metres wide and around 33 metres in length, with a gradual rise on its northern side that appears to trace the outer edge of the circular enclosure. The record was compiled by Martin Fitzpatrick and revised by Caimin O'Brien following Carey's visit.

There is little to see on the ground without prior knowledge of what to look for, and even then, the surviving arc of low ground demands patience and a good eye for subtle changes in topography. The site sits in working farmland, so access would require permission from the landowner. Those with an interest in aerial archaeology or landscape reading may find it worth consulting the Google Earth orthoimages cited in the National Monuments Service record before visiting, as the cropmark outline, though partial, gives a clearer sense of the monument's original form than anything visible at field level.