It measures roughly a metre and a half across and stands just sixty centimetres high, a modest mound of limestone and sandstone pieces in assorted sizes, shaped into something approximately circular by whoever placed them there. Its scale is domestic, almost incidental, yet its presence on this particular slope, with clear sightlines south towards Mangerton Mountain, suggests it was not placed carelessly.

Cairns of this kind are among the most ambiguous features in the Irish landscape. The word simply means a heap of stones, and the form has been used across millennia for purposes ranging from burial to boundary marking to simple wayfinding. What makes Ballahacommane quietly interesting is that this cairn does not stand alone. A second cairn lies approximately fourteen metres to the south-west, close enough to suggest a deliberate relationship between the two, though what that relationship signifies remains unclear. The site was documented by O'Donnell in 2001 and again in 2003, but the notes are spare, and the stones themselves offer no easy interpretation.

The location compounds the puzzle. The ridge setting with its southward prospect over Mangerton would have made this a conspicuous spot in an otherwise open upland, the kind of place where a marker of some kind, whether memorial, territorial, or ritual, might have seemed fitting to people moving through or working this landscape at almost any point in the past two thousand years or more. The overgrowth that now surrounds both cairns makes the site feel forgotten rather than mysterious, two small accumulations of mixed stone slowly disappearing into the hillside above Kerry.