The northern edge of the enclosure is not a constructed wall at all, but the raw rock of the hillside itself, reinforced by natural boulders, and a mountain spring flows directly into the interior from this point. That detail is easy to overlook, but it suggests that whoever built and used this space had water access built into the very fabric of the site.

The enclosure measures roughly 18.6 metres north to south and 20.8 metres east to west, defined by a wall approximately a metre wide that survives best on the eastern side, where it still stands to an external height of around 0.68 metres. A possible entrance, about 2.5 metres wide, opens to the west. A further wall extends outward from the southern side in a roughly north-east to south-west direction, hinting at a more complex arrangement of space than the enclosure alone would suggest. Just 5.5 metres to the east lies a hut site, a low earthwork remnant of a domestic structure, indicating that this was once a cluster of activity rather than an isolated feature. The whole sits within the broader Spinans Hill hillfort complex, one of the larger such groupings in the county. A hillfort, in simple terms, is a defended settlement enclosed by earthen banks or stone ramparts and typically dating to the later prehistoric period; the stone rampart of the Brusselstown Hill hillfort rises on the slope immediately above this enclosure, suggesting a relationship between the two, though the precise nature of that relationship remains unclear.