It is recorded as a fulacht fia, one of the low, horseshoe-shaped earthworks found in extraordinary numbers across Ireland, most dating to the Bronze Age. The typical fulacht fia consists of a mound of fire-cracked stone surrounding a trough, which would have been filled with water and heated by dropping in stones from a nearby hearth. Their exact purpose has been debated for decades; cooking, textile processing, and bathing have all been proposed, and it is quite possible they served more than one function across their long period of use.

What makes the Coolroe More example quietly notable is not any particular feature of the monument itself, at least none that can be reported, but rather the gap it represents. When surveyors came to document it for the Archaeological Inventory of County Cork, permission to inspect the site was refused. The mound was noted, mapped, and then left, known only by its outline on a 1937 six-inch Ordnance Survey sheet. It sits in the record as a kind of placeholder, a confirmed presence without a confirmed character. Given that Ireland has thousands of fulachta fiadh, many of them unexcavated, it is not unusual for individual examples to be incompletely understood. What is less common is for one to be formally recorded as off-limits, its details withheld not by time or erosion but by a closed gate.