A curving earthen bank, running roughly south to north and reaching up to two metres in height, describes an arc of about 8.5 metres in diameter, with a shallow depression on its inner face. The eastern half has left no visible trace on the surface, whether ploughed away, eroded, or simply waiting beneath the grass.

This is a ring barrow, a type of funerary monument typically dating to the Bronze Age, in which a circular earthen mound or bank enclosed a burial, sometimes with a surrounding ditch. They are found across Ireland and Britain, though they rarely survive intact in agricultural land. What makes the Knockatreenane example quietly interesting is the name local people gave it. By 1939, when the folklorist and archaeologist P. J. Hartnett noted it, the site was already known locally as a lios, the Irish word for a ringfort, the kind of enclosed farmstead built and used in the early medieval period, roughly the fifth to twelfth centuries. The confusion is understandable: a curved bank with an interior hollow looks much the same whether it once enclosed a prehistoric burial or a later farmstead. The misidentification tells us something about how communities read and inherit a landscape, applying the names and meanings that make sense within living memory, even when the actual origin of a feature lies far deeper in time.