The earthwork is subtle enough that a passing walker might read it as nothing more than a gentle undulation in the field, yet its shape is deliberate and ancient.

A ringfort, or rath, typically consisted of a circular area enclosed by one or more earthen banks and ditches, serving as a defended homestead for a family and their livestock during the early medieval period, roughly 500 to 1000 AD. This particular example was recorded on the Ordnance Survey six-inch map of 1842, where it appears as a hachured circular enclosure, the small radiating lines used by cartographers of that era to indicate a raised or embanked feature, with a diameter of approximately thirty metres. On the ground today, the surviving earthwork measures around twenty-eight metres east to west, defined by little more than that low rise in the pasture. The slight discrepancy between the two measurements may reflect centuries of gradual erosion, agricultural levelling, or simply the imprecision that comes with mapping a feature that was already degraded by the mid-nineteenth century.