It does not appear at ground level at all. The only record of its existence as a visible feature comes from the Ordnance Survey map of 1837, which marks it simply as a 'mound', an elongated rise in the ground measuring an estimated fifteen metres in length and ten metres in width. Sometime in the nearly two centuries since that survey was made, the feature was levelled entirely into the surrounding farmland, leaving no trace a casual observer could detect.

The site sits in lowland tillage country, the kind of productive agricultural landscape that has, over generations, swallowed a great many earthworks of this kind. Ploughing, drainage, and land improvement have long been the enemies of low-lying mounds, which lack the height or stone construction that might have given them a fighting chance of survival. The 1837 OS mapping, compiled during the first great systematic survey of Ireland, preserved a record of the feature at a moment when it was still, just about, legible in the landscape. Without that cartographic snapshot, the site at Kilmartin would be entirely unknown. The record was compiled by Geraldine Stout and updated by Christine Baker, and uploaded to the national monument record in January 2015.

There is, in practical terms, nothing to see here in the conventional sense. The field where the mound once stood is private agricultural land, and even with access there would be nothing visible at ground level to reward the eye. The interest of the site lies entirely in the archival fact of it, in what the 1837 map captures and what the landscape no longer shows. For anyone drawn to the idea of absence as much as presence, the Kilmartin earthwork is a reminder that the record of a lost feature is itself a form of survival, however thin.