There is nothing to see from the road, no marker, no mound, no visible break in the soil. The only evidence that something lies beneath comes from the air, in the form of a cropmark, a phenomenon where buried features cause the plants above them to grow differently, usually slightly taller or a different shade of green, tracing the outline of whatever was dug into the earth centuries or millennia ago. In this case, the cropmark reveals a roughly circular area defined by the line of a ditch, with what appears to be a gap on the eastern side that may represent an original entrance.

The site at Courtlough was identified from a Digital Globe orthoimage, a high-resolution satellite photograph, captured sometime between 2011 and 2013. The record was compiled by Caimin O'Brien, drawing on details provided by Jean-Charles Caillère, and uploaded to the national record in January 2023. Circular ditched enclosures of this kind are common across the Irish landscape and can represent a wide range of things: early medieval ringforts, which were enclosed farmsteads typically dating from roughly the fifth to the twelfth century; prehistoric burial monuments; or ritual enclosures of various periods. Without excavation, it is impossible to say with certainty what this particular feature was, or when it was made. The possible entrance gap at the east is a detail worth noting, since eastward-facing openings appear with some frequency in early Irish enclosures, though that association alone is far from conclusive.

There is nothing for a visitor to see on the ground at Courtlough. The field is under tillage, meaning it is actively farmed, and no public access is indicated. The interest of the site lies almost entirely in what the aerial record reveals, and the most practical way to engage with it is through the National Monuments Service mapping viewer, where the orthoimage and the recorded details can be examined directly. It serves as a useful reminder that the landscape of County Dublin, often assumed to have been heavily altered by centuries of agriculture and suburban development, still holds features that have not been touched, even if they can no longer be seen.