The enclosure, roughly 34 metres in diameter, is defined by a scarp, a slight but deliberate drop in the ground surface that traces the perimeter of what was almost certainly a ringfort. Ringforts, the most common monument type in Ireland, were typically farmsteads of the early medieval period, enclosed by one or more earthen banks to protect livestock and signal the status of whoever lived within. This one is subtle enough that its outline only becomes clearly legible from aerial and satellite imagery rather than from ground level.

What makes the site particularly interesting is its position within a wider pattern. It is the most north-easterly of six ringforts arranged in a line along the same ridge, a configuration that suggests the landscape here was deliberately and systematically settled, with each enclosure claiming its own portion of the slope. Around 153 metres to the south-west lies a ring-barrow, a low circular mound typically associated with burial rather than habitation, adding a further layer of activity to the ridge. The enclosure at Drummeen was identified and reported to the National Monuments Service by Jean-Charles Caillère, using satellite imagery from Digital Globe dated between 2011 and 2013, with later confirmation from Google Earth imagery captured in February 2021. It is the kind of discovery that aerial photography and remote sensing have made increasingly possible, bringing previously unrecorded features into the official record without a single spadeful of earth being turned.