On a south-facing slope in the undulating grassland of Ballytrasna in County Galway, this subcircular earthwork is one of at least three ringforts within a few hundred metres of each other, the nearest lying only about forty metres to the north. That density is worth pausing over. These were not communal monuments in the way a hillfort or a ceremonial enclosure might be; each ringfort was almost certainly the enclosed farmstead of a single family or extended household, probably dating to the early medieval period, roughly the fifth to twelfth centuries. Finding several in such close proximity suggests a landscape that was, at some point, well settled and actively farmed.

The earthwork itself measures roughly 36 metres east to west and 33 metres north to south, giving it a slightly compressed, subcircular shape. It is defined by two banks with an intervening fosse, which is the ditch dug between them, the excavated material typically thrown outward to build up the banks and create a combined barrier against livestock and, perhaps, opportunistic raiding. The outer bank survives best from the south around to the west. At the northern side, a later field wall has been built directly over the monument, which is a common enough fate for earthworks that were no longer understood as ancient by the farmers who came after. Several gaps in the banks appear to be modern intrusions rather than original entrances. The site is described as being in fair condition, meaning it is legible but has suffered the gradual attrition of agricultural land use over many centuries.