Ring barrows are funerary monuments, typically Bronze Age in origin, consisting of a central burial platform enclosed by a surrounding ditch and outer bank. What makes this example quietly compelling is the precision with which its proportions survive: the central grass-covered platform measures twelve metres in diameter, slightly domed, and the whole monument extends to twenty-one metres across from the crest of one outer bank to the other.

The structure follows a clear concentric logic. The central platform is enclosed first by a fosse, a rock-cut or earthen ditch, running between one-and-a-half and two metres wide, and then by a more substantial external bank of earth and stone, which measures between three and three-and-a-half metres wide. The bank stands noticeably lower on the western side, where the ground rises and the builders appear to have dug it into the natural slope rather than building it up, giving the monument an asymmetry that is topographical rather than accidental. A shallow depression of roughly two metres in diameter sits on the north-eastern side of the central platform, possibly the trace of earlier disturbance or a feature of the original construction. Stony remnants of a later field fence have been laid across the outer bank between the north and east, a reminder that this land has been worked and divided by many successive hands. A second barrow lies roughly three hundred metres to the north-west, suggesting this corner of Mayo once held a concentration of funerary monuments in the same stretch of ground.