A ring ditch, in general terms, is the crop or soil mark left by a circular trench that once surrounded a burial mound or ritual enclosure; the mound itself may have long since been ploughed flat, leaving only this ghostly outline detectable from the air or through geophysical survey. What makes this particular example quietly arresting is its eastern gap, an interruption in the circuit of the ditch that may have served as an entrance, an orientation point, or something else entirely that remains a matter of interpretation.

The site came to formal attention through a geophysical survey carried out under licence number 12R010 by the Discovery Programme, the Irish state-funded body dedicated to large-scale archaeological research. The work was conducted as part of the 'Late Iron Age and "Roman" Ireland' project, an initiative examining the period roughly spanning the early centuries of the first millennium AD, when Ireland sat outside direct Roman control yet was far from untouched by the wider Roman world. The survey identified this ring ditch, measuring eight metres in diameter, towards the base of Popeshall hill, approximately two hundred metres south-west of a ring ditch cemetery. That cemetery context is significant; it suggests the landscape here was used repeatedly and deliberately for funerary or ritual purposes over an extended period. The findings were documented by Dowling in 2013, and the record was compiled by Christine Baker and uploaded in February 2015.

The site is not formally open to visitors in any managed sense, and because it was identified primarily through geophysical survey rather than excavation, there is little visible at ground level to distinguish it from the surrounding agricultural land. Those with a serious interest in the archaeology of north Dublin would do better to begin with the Sites and Monuments Record entry and cross-reference the paired ditch recorded under DU005-176001, since understanding the two features together gives a clearer sense of what may have been happening in this corner of the Fingal landscape. The area around Popeshall hill rewards careful attention on a clear day, when the subtle variations in ground level that aerial survey exploits become slightly more legible to an informed eye.