It has a monument number. It exists on maps. Beyond that, the record is effectively silent.

Mounds of this kind appear throughout Ireland in considerable variety. Some are the eroded remains of ringforts or raths, the enclosed farmsteads of early medieval Ireland. Others are burial mounds, some prehistoric, some later. A few turn out to be natural glacial features that accumulated folklore and, eventually, an entry in an archaeological register. Without further detail, Rathreagh's mound could belong to any of these categories. The townland name itself offers a faint clue: "rath" in Irish placenames typically signals the former presence of a ringfort, a circular earthwork enclosing a dwelling, though names can fossilise long after the original feature has been ploughed away or altered beyond recognition. Whether the mound and the name refer to the same thing, or to two separate features in the same small patch of ground, is one of those questions the landscape keeps to itself for now.