The fort measures about 90 metres in diameter, with walls constructed from sandstone conglomerate boulders that range from 3 to 3.6 metres wide and stand between half a metre to a full metre in height.

The defensive wall remains visible in several sections; particularly in the northwest, north, east, southeast and southwest quadrants of the circle. A striking feature is a large upright boulder standing 1.5 metres tall along the wall line in the southeast quadrant, perhaps serving as a marker or having some ceremonial significance. At the heart of the hillfort lies a central cairn, a stone mound that likely held ritual or burial importance for the community that once inhabited this elevated stronghold.

What makes this site particularly intriguing is what aerial photography revealed that ground surveys couldn't: an outer enclosure measuring approximately 230 metres in diameter that once surrounded the main fort. This larger defensive ring was identified through Air Corps and Geological Survey photographs from the 1970s, with the eastern quadrant actually following the current townland boundary, which kinks outward to accommodate the ancient earthwork. While forestry activity has obscured this outer enclosure at ground level, its ghostly outline in aerial images hints at a more complex defensive system than initially apparent, suggesting Curraghadobbin was once a significant strategic location in ancient Tipperary.