It is easy to overlook, the kind of feature that a walker might cross without registering what it once enclosed. But the dimensions tell a different story: roughly 57 metres north to south and 62 metres east to west, this is a substantial enclosure, and the gap of just over three metres in the south-east bank is almost certainly where people once passed in and out.

This is a rath, the Irish term for a ringfort, a type of enclosed farmstead built and used throughout early medieval Ireland, broadly from around 500 to 1000 AD, though some were constructed earlier or later. Raths were typically the homes of farming families of some social standing, the bank and sometimes an outer ditch serving as much as a marker of status and a pen for livestock as a defensive structure. The grass-covered mounds of stone visible inside this one hint at the remains of structures that once stood within, perhaps the footings of a house or an outbuilding, though the detail is now buried beneath centuries of growth and soil movement. What survives above ground at Ballynamuddagh was recorded in D. Lavelle's 1994 archaeological survey of the Ballinrobe district, which also takes in the landscapes around Lough Mask and Lough Carra. The site's position on high ground, with commanding views stretching to the south-east and south-west, suggests its original occupants chose the location carefully, whether for surveillance, for the drainage benefits of a slope, or simply because elevated ground carried its own prestige.