Measuring roughly two and a half metres east to west and just over a metre north to south, the spread is small enough to overlook entirely, yet the heat-fractured stone and blackened material beneath the surface tell a more deliberate story.

Burnt mounds, known in Irish archaeology as fulachta fiadh, are among the most common prehistoric monument types found across Ireland. They typically consist of a mound of shattered, fire-cracked stone accumulated beside a water source or trough, the by-product of repeatedly heating stones and dropping them into water, most likely for cooking. This particular spread at Mountcatherine may represent a cooking pit associated with a larger burnt mound recorded a short distance to the north. Its position between the two drains, untouched by either, suggests it was already present in the ground before the drainage works were carried out, preserving what may be the peripheral trace of a prehistoric activity area connected to that neighbouring site.