What remains of this circular earthwork in Ballagh, County Galway is barely legible in the landscape, yet the name 'Lisvalleybrinoge' was still in local circulation when recorded by Neary in 1914, long after the physical fabric had begun to dissolve back into the ground. That persistence of place-name memory, attached to something so worn away, is quietly striking.

A rath is a ringfort, the most common type of early medieval enclosed settlement in Ireland, typically consisting of a raised circular area defined by one or more banks and ditches. This example, roughly forty metres in diameter, sits on a rise in grassland with bogland stretching away to the east. What survives is a scarp, an intervening fosse (the ditch running between the inner and outer elements), and a remnant outer bank visible from the north-west, around through north, to the north-east. A field boundary has been laid directly over part of that outer bank at some point, which accounts for some of the confusion in the earthwork's outline and contributes to its poor state of preservation. The combination of gradual erosion and later agricultural reorganisation has reduced what was once a defined enclosure to something that requires a careful eye to read.