A ring-ditch, roughly six metres in diameter, leaves no surface trace that a person on foot would recognise, yet the buried archaeology announces itself through the grass in a way that aerial observation makes plain. This is the particular quiet strangeness of cropmarks: the buried cut of an ancient ditch alters how deeply plant roots can reach, and in dry conditions the difference in soil moisture produces a faint but telling variation in crop or grass colour, drawing a circle on the land that has waited, sometimes for millennia, to be noticed again.

A ring-ditch is essentially the filled-in remains of a circular trench, often all that survives of a prehistoric burial monument after centuries of ploughing and land improvement have levelled the original mound above it. The ditch would once have enclosed a low earthen barrow, and such features are commonly associated with Bronze Age funerary practice, though without excavation it is impossible to say with certainty what this particular example held or when it was dug. The cropmark at Coolreagh was identified on a Google Earth orthoimage captured on 16 March 2016, and the record was compiled by Caimin O'Brien, drawing on details provided by Jean-Charles Caillère, with the entry uploaded in July 2022. That the feature survived at all beneath reclaimed agricultural land is itself something worth pausing over.

There is no visitor infrastructure here, and the site is not marked or signposted in any way. The ring-ditch sits within working farmland, and the cropmark is visible only under the right conditions, principally during dry spells in late spring or summer when soil moisture differences are most pronounced, and only from aerial imagery rather than from ground level. Anyone curious about this kind of archaeology is better served by examining the Google Earth orthoimage attached to the record than by attempting to locate the spot in the field itself. The Connello Upper barony covers a substantial stretch of west Limerick, and this small circle of ancient disturbance is, to the naked eye, simply a field like any other.