That gap in the cartographic record is itself a small puzzle: the monument was either missed by the earlier surveyors or had not yet been sufficiently exposed or recognised. Either way, it had been there long before anyone thought to draw it.

A ring barrow is a burial monument of prehistoric origin, typically consisting of a central flat or mounded area enclosed by a circular ditch and an outer earthen bank. At Carrowcloghagh, the central area measures roughly ten metres in diameter, ringed by a shallow fosse (the encircling ditch, between 1.2 and 1.4 metres wide) and an external bank about 1.7 metres wide, rising half a metre on its outer face. The overall diameter, measured from the middle of the bank on one side to the middle on the other, runs to between fifteen and fifteen and a half metres. At some point, the bank on its western and northern sides was absorbed into later field fencing; those fences have since been removed, but remnants of stone facing survive along the outer edge of the bank. Immediately to the west, almost touching the barrow's outer edge, there is a grassed-over depression roughly ten metres long and two to three metres wide, the result of some unrecorded past disturbance. It sits close enough to raise questions about whether whatever lay inside was interfered with.

What makes the site feel less like an isolated curiosity and more like a fragment of a larger, mostly unread landscape is its position within a cluster of related monuments. This barrow is the most north-easterly in a group that includes further ring barrows, possible barrows, and cairns lying within 240 to 400 metres to the west-southwest and southwest, with a possible ring cairn around 550 metres to the southwest. The Deel River runs about 200 metres to the north. To the south-southwest, Nephin Mountain dominates the view, and the Nephin Beg Range stretches along the western skyline. Whether those alignments were meaningful to the people who built here is unknowable, but the concentration of monuments in this part of Mayo suggests that, at some point in prehistory, this modest rise in the ground was considered a significant place.