A circular rath, roughly 56 metres in diameter, survives as a grass-covered arc of drystone walling running from the north-east around to the south-east. To the west, the enclosing element has all but disappeared into the surrounding grassland, leaving only faint traces that would be easy to miss without prior knowledge of the site.

Raths were enclosed farmsteads, typically dating from the early medieval period, roughly the fifth to the twelfth centuries. They served as the defended homesteads of farming families, with the enclosing bank or wall providing security for people and livestock. At Cregg, the construction was in dry stone rather than the earthen banks more commonly associated with raths elsewhere in Ireland, a distinction that reflects local building traditions and available materials in this part of north Galway. The most legible feature still visible is a stone-lined entrance on the south-east side, approximately 2.5 metres wide, which gives a clear sense of how deliberately designed the original structure was, even if much of the surrounding enclosure has since been lost. A later field wall cuts across the monument at both the north and south, a routine casualty of agricultural reorganisation over the centuries, and the division it creates helps explain why the western arc has fared so poorly compared to the eastern stretch. The site is noted by de Valera and Ó Nualláin in 1972 and by Claffey in 1983, both recording its condition as poorly preserved.