This roughly rectangular enclosure measures 51 metres east to west and 37 metres north to south, defended by an impressive double-bank system with an intervening water-filled ditch, or fosse. The inner earthen bank rises 0.8 metres on the interior side and 2.2 metres on the exterior down to the fosse base, whilst the outer bank, constructed of earth and stone on the southern and western sides, stands 2.4 metres high from the fosse floor on its inner face and 0.9 metres on its external side.

The site’s defensive fosse varies considerably in character around its circuit; narrow and V-shaped on the south, broad and flat-bottomed on the west, largely silted up along the north, and shallow with a flat bottom on the eastern side. Two entrances breach the defences: a main western entrance where both banks are interrupted by a gap approximately 2.4 metres wide, and a secondary break at the northwest corner. Water management was clearly important to the site’s builders, with a leat channelling water into the fosse at the northwest corner before it exits through outlets at the centre of the eastern side and the southeast corner.

The antiquarian John Windele visited this “double-ramparted square fort” in April 1849, noting its deep, wet fosse with a running stream and evidence that treasure hunters had been digging in the northeast quadrant of the interior, searching for gold. The site appeared on the 1935 Ordnance Survey map showing the outer bank on all sides, though today only the southern and western sections of this outer defence remain visible. The gently sloping interior, now planted with deciduous trees, conceals centuries of history, whilst a fulacht fiadh, an ancient cooking site, lies just 20 metres to the northwest, suggesting this area has been significant to local communities for millennia.