Sitting on top of a north-to-south ridge in open pasture in County Sligo, the rath at Carrowgilpatrick has been so thoroughly absorbed into the landscape that a field boundary now runs directly over part of its bank, and its original entrance has been lost entirely. A rath is a ringfort, the most common type of early medieval settlement monument in Ireland, typically a circular or oval area enclosed by one or more earthen banks and ditches, and used as a farmstead by a family of some local standing. This one is oval, measuring roughly 36 metres north to south and just under 25 metres east to west, which gives a reasonable sense of the domestic space once enclosed within.

The enclosing bank is made of earth and stone, and its condition varies considerably depending on where you measure. At the south and west it is best preserved, rising to around 0.9 metres in height, while elsewhere it has been reduced to little more than a scarp, a sharp break in the ground rather than a proper raised feature. A shallow fosse, the ditch that originally ran outside the bank, survives along the northeast to south-southwest arc, between three and three and a half metres wide. A separate outer bank is reasonably intact along the northwest-to-north stretch but becomes low and degraded as it continues southward. Inside the enclosure, low sod-covered ridges may indicate internal divisions, the kind of subtle earthwork evidence that suggests the interior was once organised into distinct functional areas, perhaps separating living quarters from animal enclosures. The most structurally intriguing feature is a souterrain, an underground stone-lined passage typically used in early medieval Ireland for storage or refuge, accessed through the inner bank on the western side. The presence of a souterrain suggests the site was more than a simple field enclosure and points toward sustained, purposeful occupation.