That absence is, in its own way, the point. A circular enclosure once occupied this ground, roughly 44 metres across at its widest, and it was substantial enough to be recorded on the Ordnance Survey maps of both 1838 and 1931. Today the pasture has been reclaimed and levelled, and no visible surface traces remain.

Circular enclosures of this kind are among the most common archaeological monument types in Ireland, typically the remains of a ringfort, a type of enclosed farmstead built and occupied largely during the early medieval period, roughly between the fifth and twelfth centuries. They were constructed in earth or stone, sometimes both, and served as a combination of domestic space and livestock enclosure for a farming family of some local standing. The Cloonnagoppoge example sat within an area that also encompasses Lough Mask and Lough Carra, a landscape documented in a 1994 archaeological survey of Ballinrobe and its surrounding district. That survey captured the enclosure's dimensions and position before, or perhaps just as, agricultural improvement erased whatever earthwork had survived into the twentieth century. The fact that it still appeared on the 1931 Ordnance Survey revision suggests it was at least partially intact within living memory of that survey's compilation.

There is nothing to find on the ground now, and that is worth sitting with for a moment. The OS maps effectively became the monument's last witnesses, recording a circle in a field that farming eventually smoothed away.