This low-lying stretch of grassland at Mountbrowne, in County Galway, contains a well-preserved subcircular rath, its earthen bank and external fosse, the ditch dug around the outside to throw up material for that bank, still clearly legible in the ground after more than a thousand years. The enclosure measures roughly thirty metres east to west and just under twenty-nine metres north to south, making it a fairly typical example of its type in terms of scale, though its condition sets it apart from many comparable sites that have been ploughed out or built over.

A rath is the most common form of early medieval settlement monument in Ireland, essentially a farmstead enclosed by one or more earthen banks, occupied roughly between the fifth and twelfth centuries. What gives the Mountbrowne example additional interest is a rectangular structure inside the western half of the enclosure, measuring approximately nine and a half metres long by just under seven metres wide. This feature may represent the footprint of a house, though its precise date and function remain uncertain. The presence of a second ringfort, visible on the ground around two hundred metres to the east, raises questions about the relationship between the two sites, whether they were contemporary, whether families or communities divided the land between them, or whether one succeeded the other over generations. The notes do not resolve that question, and the archaeology has not yet been excavated to do so either.