It has a classification, a map reference, and a place in the official register of Irish monuments, yet what it actually looks like, how large it is, and what purpose it once served remain, for now, undocumented in any accessible form.

Earthworks is a broad category that can cover an enormous range of structures, from the low, grassed-over banks of a ringfort, which was a circular enclosure used as a farmstead or defended dwelling during the early medieval period, to the more irregular platforms and ditches associated with field systems, burial mounds, or enclosures of uncertain date. Mayo has no shortage of any of these. The county's landscape preserves traces of human activity reaching back several thousand years, with features that often survive as subtle rises and hollows in pasture that a casual walker might cross without a second glance. Whether the Lanmore earthwork belongs to any of these familiar types, or represents something less easily categorised, is not yet part of the public record.