A cashel is a type of early medieval ringfort built entirely from stone rather than earth and timber, and this one makes the most of its natural position: the ground drops sharply away to the west, north, and east, making the enclosure both visually commanding and defensively shrewd. The surrounding landscape of small, stone-walled fields and rough stony pasture stretches out in all directions, much of it now edged by forestry, while two stream valleys merge at the north-west below the ridge.

The enclosing wall, two metres thick for most of its circuit, is built from large, roughly rectangular limestone blocks, with especially massive stones laid in the lower courses. On the eastern side, where the natural slope is steepest, the builders introduced a pronounced batter, angling the wall face outward at the base to compensate for the incline. The southern face, by contrast, rises vertically to a surviving height of around two metres, the best-preserved section of the structure. At the south-east, the wall thickens further to three metres to accommodate an entrance passage, flanked by massive stone blocks, that narrows slightly as it moves inward from 1.3 metres to 1.15 metres. Just outside this entrance, a large limestone slab measuring 2.4 metres in length lies flat on the ground; it is thought to be a displaced roofing lintel, its original function being to roof the passage entirely. The entrance faces south-east, towards the most gradual slope of the ridge, which would have served as the natural approach route. The cashel is recorded in local tradition under the name Caiseal Claine Meirg.

The interior, which takes in the entire flat top of the knoll, is scattered with loose stone, and at its centre sits a small square structure of rough drystone construction, originally about two metres by two metres and roughly a metre high, though now partly collapsed. Its function is uncertain, and it appears to be of relatively recent date; local sources have described similar features in the interior as possible houses. A large displaced lintel lying outside the entrance is easy to spot, and the eastern wall face, with its visible batter and surviving height, gives the clearest sense of the original scale of the enclosure.