The ridge it sits on is still known as Cairnhill, a name that suggests something older and more substantial once marked this spot, and the mound itself has quietly outlasted whatever landscape once surrounded it.

The mound is oval in plan, measuring thirteen metres in length, eight metres in width, and standing two metres high, orientated on a northeast to southwest axis. Its flat top is a characteristic sometimes associated with medieval or earlier ceremonial earthworks, though the notes compiled by archaeologists Geraldine Stout and Padraig Clancy record it simply as an earthen construction without assigning a firm function or date. The reference to Healy (1975) points to survey work carried out in the mid-1970s, a period when many such features in the greater Dublin area were being documented before suburban expansion made their survival increasingly uncertain. That this one endured is partly a matter of luck and partly the result of being planted with mature beech and oak trees, which gave the mound enough of a presence to remain visible and, apparently, untouched.

The mound sits within the Foxrock area, reached by navigating the residential streets that now encircle Cairnhill. Because it is set into a housing estate rather than an open field or managed heritage site, there are no formal facilities or signage to guide a visitor. The tree cover means it reads as a small wooded rise among the houses, which can make it easy to mistake for an ornamental feature rather than a prehistoric or early historic earthwork. The best time to look for it is late autumn or winter, when the beech and oak canopy thins enough to let the shape of the mound read clearly from the surrounding ground level. What to look for is the distinct flat summit and the deliberate oval outline, details that distinguish it from a natural drumlin or glacial rise and hint that whoever raised it had a specific purpose in mind, even if that purpose is no longer recoverable.