This cashel, a type of ringfort built from dry-stone walling rather than earthen banks, sits on an elevated ridge at Gragan with open views sweeping from north-east to north-west. Its circular enclosure measures roughly 23 metres east to west and 17.5 metres north to south, defined by a wall that survives to no more than 0.7 metres in height and runs in discontinuous sections between one and one and a half metres wide. A possible entrance gap opens to the south, and traces of walls extend outward from the main circuit at the north and south-south-west, suggesting the site once connected to surrounding land divisions.

The ridge at Gragan preserves what archaeologists describe as a multiperiod field system, meaning successive generations shaped and reshaped the landscape here across different eras, leaving overlapping traces that are difficult to unpick. This cashel was recorded on the six-inch Ordnance Survey maps of both 1842 and 1916, marked using hachures, the cartographic convention for showing enclosed or raised ground, which confirms its visibility even in a degraded state across nearly two centuries of mapping. A natural rock ledge runs north-north-east to south-south-west through the eastern sector of the interior, a geological feature that may have influenced where the builders chose to place their walls. A second cashel lies approximately 20 metres to the north-west, and a pair of further enclosures cluster around 100 metres to the north-north-west, making this corner of the Burren unusually rich in early settlement evidence concentrated within a very small area.