Cartographers working on the Ordnance Survey in 1838 recorded a circular enclosure here, carefully marking its outline. Today, that outline is gone. The field has been levelled, the grass grows evenly, and there is nothing visible at the surface to suggest that anything ever stood or was enclosed here at all.

The site is tentatively identified as a ringfort, the most common class of early medieval monument in Ireland. Ringforts, typically dating from roughly the fifth to the twelfth centuries, were enclosed farmsteads, their circular banks and ditches defining a domestic space for a family and their livestock rather than serving any strictly military purpose. Thousands survive across the country in varying states of preservation; many thousands more have been ploughed, levelled, or gradually absorbed into the agricultural landscape over the centuries. The enclosure at Carrownagurraun appears to belong to that latter category. What the 1838 surveyors saw, and what has since disappeared, is recorded in a local archaeological survey of the Ballinrobe district compiled by D. Lavelle in 1994, covering the broader area around Lough Mask and Lough Carra.