A roughly circular rise of around twenty metres across is all that survives of what was once a distinct oval embanked enclosure, its earthworks levelled during land reclamation and its outline now merging quietly with the natural contours of the hill. The ground drops steeply to the north and north-east, and the site commands views stretching north to south, which suggests that whoever built here was thinking carefully about position.

The enclosure belongs to a class of monument found across Ireland, typically a roughly circular area defined by a raised bank, sometimes interpreted as a ringfort or an earlier prehistoric boundary, though no specific dating evidence is recorded for this particular example. What makes Tooreen unusual is the degree to which the historical record contradicts itself. The site appears clearly on the Ordnance Survey twenty-five inch plan and on the 1916 six-inch map, where it is shown as an oval embanked enclosure measuring approximately twenty metres north-west to south-east and between fifteen and twenty metres north-east to south-west. Field walls radiate outward from it in four directions, to the north-north-east, south-east, south-south-west, and west-north-west, suggesting the enclosure was incorporated into a working agricultural landscape and used as a kind of hub from which boundaries extended. Yet by the time the 1938 six-inch revision was made, the enclosure had vanished from the map entirely. An aerial photograph independently confirms what the earlier mapping showed, preserving a record of something the ground itself no longer clearly displays.

A visitor standing on the knoll today would need patience and a good eye. The earthwork has been levelled, and what remains is an ephemeral rise that requires knowing what to look for before it becomes legible. The higher ridge to the west and south-west looms over the site, a reminder that the knoll, despite its local prominence, sits in a broader landscape that long ago absorbed this small enclosure back into its ordinary contours.