A rath, as ringforts of this earthen type are known, was typically a circular enclosure of banked earth used as a farmstead during the early medieval period, probably between the fifth and twelfth centuries. They are among the most common archaeological monument types in Ireland, yet individual examples like this one tend to disappear incrementally, absorbed into the working landscape until only a curved ridge in a pasture hints at what was there.

The enclosure at Courtbrack was recorded on the Ordnance Survey six-inch map of 1842, shown as a hachured circle of roughly thirty metres in diameter, sitting at the northern side of a farmyard. By the time the same area was surveyed again for the 1904 edition, the western half had already been removed, and the 1937 map confirmed that this loss was permanent. What remains is an arc of earthen bank along the northern and north-eastern curve of the original circle, and that remnant has since been incorporated into the field fence system, giving it a kind of accidental afterlife as a boundary feature rather than an archaeological one.