The field looks unremarkable at ground level, its grass tidy and cultivated, and neither Ordnance Survey Ireland historic maps nor satellite imagery taken between 2005 and 2013 show any trace of it. The only record of its existence comes from a single aerial photograph.

A ring-barrow is a burial mound, typically of Bronze Age or Iron Age date, defined by a circular bank and ditch enclosing a low central mound. The example at Coolnashamroge was identified during the Bruff aerial photographic survey in 1986, recorded as Bruff 26102 (AP 4/3665), when the cropmark or soilmark of its circular form became legible from above. It measures approximately eight metres north to south and nine metres east to west. What makes the site particularly interesting is its context: this is not an isolated monument but one of at least twelve ring-barrows clustered across three adjacent fields, forming what archaeologists recognise as a barrow cemetery, with the cluster extending roughly 200 metres in diameter. A further ring-barrow lies just 15 metres to the west-northwest. Three hundred metres to the south-east, across the townland boundary in Ballyphilip, a separate but comparable cemetery of another twelve barrows has also been recorded. The density of prehistoric funerary activity across this small corner of Limerick is considerable, even if little of it is now visible at the surface. The most recent Google Earth imagery, from June 2018, suggests the land has been reclaimed and reseeded at some point in the late twentieth or early twenty-first century, which accounts for the monument's current invisibility.

Visitors hoping to see something at ground level are likely to be disappointed. The field shows no surface trace, and the barrow is not marked on any publicly available map. The value of the site lies more in what the aerial record reveals about the prehistoric landscape than in anything a walker would encounter. Those with an interest in aerial archaeology or funerary monuments of this period may find the Bruff survey archive a rewarding place to start, with the compiled record uploaded by Edmond O'Donovan in September 2020 providing the clearest summary of what is known.