It measures approximately thirteen metres in diameter, and its origins remain uncertain. It has not been excavated, and no documentary record appears to attach a name or story to it. What it is, precisely, nobody yet knows.

The mound was reported by Conn Herriott and identified through aerial imagery captured between 2013 and 2018. At this altitude, the landscape is exposed and thinly settled, and features like this one can pass unnoticed for generations. Circular earthen mounds of this general kind in Ireland range considerably in date and purpose. Some are burial mounds from the Bronze Age, others are the remains of ring barrows or cairns, and a small number turn out to be entirely natural. Without fieldwork, the Sladoo mound sits in that ambiguous category of features that aerial survey flags but cannot resolve. Its elevation alone makes it notable; upland monuments tend to survive better than lowland ones, where agriculture has had more opportunity to level or disturb them, but they are also harder to reach and study.