That division is now the clearest thing about the site: a road simply went through it, and the western half effectively disappeared.

A rath is an early medieval enclosure, typically circular, formed by one or more earthen banks and ditches, and used as a farmstead or defended homestead. The Garranereagh example was recorded on the Ordnance Survey six-inch map of 1842 as a hachured circular enclosure roughly 35 metres in diameter, with a north-south roadway already cutting across it. By the time the 1904 revision was made, only the eastern half was considered worth marking at all. That progressive erasure from the cartographic record mirrors what happened on the ground: no visible surface trace of the western bank survives today, and a lime kiln, a small stone-built structure once used to burn limestone for agricultural lime, that was recorded inside the south-western arc of the bank in 1842 has also been removed. What remains on the eastern side of the road is an arc of earthen bank running approximately 28.7 metres and standing around 1.7 metres high, set in pasture on a south-facing slope and heavily overgrown with vegetation.

The surviving arc is easy to miss precisely because it is so thoroughly absorbed into the landscape, its profile softened by growth and its context stripped away by the road beside it. The two maps, read together, tell a story of incremental loss: first the road, then the kiln, then the western bank, until what had been a coherent enclosure became a single grassy curve in a field.