It is a cashel, the stone-walled equivalent of the more familiar earthen ringfort, and this one has survived well enough that its form remains easy to read in the landscape. At 35 metres in diameter, it is a substantial example, its drystone wall, built without mortar, still describing the boundary of what would once have been a farmstead and its associated enclosure.

Cashels of this kind were the basic unit of rural settlement in early medieval Ireland, home to a farming family and their livestock, and in some cases a marker of local status. The eastern entrance, at just under three metres wide, is a typical placement, and its survival gives a sense of how the space was organised and accessed. What makes the Cregmore site particularly worth attention is that it does not sit alone. Roughly 40 metres to the south-east lies a separate earthwork, a different class of monument, suggesting that this corner of north Galway was a focus of activity over a considerable period. Whether these two features were contemporary or represent successive phases of use is not something the visible remains can settle, but their proximity is suggestive.