Enclosures of this kind are among the most common and most quietly enigmatic features of the Irish countryside. The term covers a broad range of structures, from the circular earthen banks of a ringfort, which would have enclosed a farmstead during the early medieval period, to later field boundaries and ceremonial or defensive perimeters whose origins are harder to pin down. What they share is a deliberate act of demarcation, the drawing of a line between inside and outside, for reasons that were once entirely obvious to the people who built them.

Ballygommon is a small townland in Mayo, a county whose boggy interior and Atlantic-facing slopes preserve an unusually dense concentration of earthworks, field systems, and enclosures from various periods of prehistory and early history. Many of these features survive precisely because the land around them was never intensively ploughed or developed, leaving earthen banks and ditches more or less as they were left centuries or millennia ago. The particular enclosure recorded here has not yet been studied in sufficient published detail to say with confidence what period it belongs to or what function it served. That gap in the record is itself telling: Mayo contains far more archaeology than has yet been fully examined.