The surrounding field boundaries have been levelled, the coarse pasture is largely uncleared, and the interior of the fort itself is overgrown with rushes and reeds. What remains is just legible enough to read, but only if you know what you are looking for.

A cashel, in Irish archaeological terms, is a stone-walled ringfort, though Cahersherkin, or Cathair Seircin as it appears in earlier scholarship, seems to have lost most of its stonework over time. The antiquarian T. J. Westropp visited the site on at least three occasions between 1900 and 1913, and by his final account had written it off as "only a small defaced ring-fort". The Ordnance Survey had mapped and named it as far back as 1840, and it reappears on the 1916 six-inch revision. What survives today is a roughly circular earthen rath, measuring approximately 42 metres north to south and 41 metres east to west, defined by a steep-sided inner bank, a marshy flat-bottomed fosse (the defensive ditch encircling the bank), and a lower outer bank. That outer bank is particularly interesting: its form so closely resembles the surrounding earthen field boundaries that it may at some point have been incorporated into the local field system and rebuilt accordingly. Several cattle gaps cut through both banks, and the outer bank has been reduced in places to little more than a low spread of earth. One feature does survive with some clarity: a gap on the eastern side, roughly three metres wide, with a faint causeway across the fosse, is thought to be the original entrance. A single boulder lies beside it, a modest but suggestive detail.

The land to the north of the site shows traces of earlier cultivation, and the elevated position gives panoramic views across the surrounding hills. A conifer plantation lies to the east. The fort sits in an area of unimproved rough grazing, which has both protected the earthworks from ploughing and made the interior difficult to read at ground level, where the rush-covered slope gives little away.