The site is a rath, the Irish term for a ringfort, which is a roughly circular enclosure defined by an earthen bank and ditch, typically built during the early medieval period as a farmstead for a family of some local standing. What remains at Foxburrow is not the bank itself but a scarp, a slight change in ground level, tracing an oval roughly 65 metres across. At that diameter, it would have been a substantial example of the type.

The Ordnance Survey 25-inch map, produced in the late nineteenth century, recorded the outline clearly enough to suggest the earthwork was more legible then than it is today. By the time satellite imagery captured the area between 2011 and 2013, the outline had degraded further, readable mainly as a crop or soil mark rather than a standing earthen form. The site sits in grassland alongside two neighbours that have fared rather better in the historical record. Taghmon Castle lies around 430 metres to the west, and St Munna's Church, with its associated graveyard, is about 300 metres to the west-southwest. St Munna, also known as Fionnán, was a sixth and seventh century Irish saint associated with several sites across Leinster and the midlands, and his name attached to this church suggests the area was of some ecclesiastical significance in the early medieval period, the same broad era in which ringforts were typically in use. Whether the rath and the church were ever connected in any direct way is not recorded.