A cashel is simply a ringfort built from stone rather than earth and timber, and this one is unusual in its shape: most ringforts are roughly circular, but this enclosure is rectangular, measuring about 29.5 metres north to south and 36 metres east to west. The wall that once defined it has largely collapsed into a grass-covered bank around 4.8 metres wide and less than a metre high, a broad grassy ridge where something far more substantial once stood.

How substantial becomes clear from a note made by William Wilde in 1872, who recorded that the cashel wall had once been ten feet thick and six feet high. Wilde, better known perhaps as the father of Oscar Wilde but also a serious antiquarian and medical doctor, was documenting the archaeology of the Lough Corrib region at the time, and his observation gives a sense of what has been lost to collapse and the slow encroachment of agricultural use. A modern field fence now cuts across the southern side of the structure, and about 14 metres to the west, low foundations of an outer wall survive at just 0.2 metres above the ground, running for roughly 25 metres. This outer wall would have formed a secondary enclosure, or bawn, adding an extra layer of definition and possibly defence to the site. There is also a local tradition of a souterrain in the interior, a souterrain being an underground stone-lined passage typically associated with early medieval settlements, used for storage or concealment, though its precise location within the enclosure has not been confirmed in the available record.