Tucked into dense woodland in Finnoo, County Limerick, this oval earthwork fort uses a steep-sided slope along its southeastern to northeastern edge in place of any man-made barrier. That slope is no accident of topography; it traces the course of a dried-up meander of the White River, a ghost of moving water that once made this promontory a naturally defensible position. The builders only needed to construct an earthen bank and ditch along the remaining arc, from northeast to southeast, to complete the enclosure.

The fort is a modest but carefully considered piece of earthwork engineering. The enclosed area measures roughly 28 metres north to south and just over 41 metres east to west, an oval shape that follows the contours available to it. The earthen bank, a raised wall of compacted soil typical of Irish ringforts and promontory forts built across the early medieval period, stands about 0.65 metres high on the interior side and rises to 1.3 metres when measured from the bottom of the external fosse, the defensive ditch that runs alongside it. That fosse is around 2 metres wide and 0.65 metres deep, not a dramatic obstacle by any measure, but enough to slow an approach and amplify the height of the bank above it. Entry to the interior was through a gap of about 4.5 metres at the northeastern end of the bank, the standard placement for a ringfort entrance, positioned away from the most exposed ground. Inside, the surface is uneven and the southeastern quadrant contains a low, slightly raised earthen mound, measuring roughly 3.2 by 1.6 metres and rising only about 0.35 metres; its function is unclear, though small internal mounds in similar enclosures have been associated with souterrains, storage pits, or structural remains. The site was recorded and compiled by Denis Power, with notes uploaded in August 2011.

The woodland setting means this is not a site that announces itself. Visibility is limited by the tree cover, which also makes the earthworks easier to miss underfoot than they might appear on a map. The old river meander, long since dry, is most readable from the interior of the enclosure, where the ground suddenly drops away along the southeastern edge. That drop is the clearest indication of why this particular rise in the landscape was chosen. The small internal mound in the southeastern quadrant is worth looking for once inside, though it is low enough that it can easily be walked past without notice.