The ringfort at Newtown sits just ten metres north of the main road through the glen, on a south-facing slope at the base of Slievenamuck mountain, and it has been quietly incorporated into the amenity grounds of the park, the surrounding field mown to lawn around it. The contrast is a little disorienting: a managed recreational landscape wrapped around an earthwork that has been in place for well over a thousand years.

A ringfort, or rath, is an early medieval enclosed settlement, typically a farmstead, defined by one or more circular earthen banks and ditches. This example is modest in scale, roughly fifteen and a half metres across, with a bank that still stands to an external height of around one and a quarter metres on its better-preserved arc, running from the south-east around through west to the north-north-west. The accompanying fosse, the external ditch dug to provide material for the bank, runs to about five metres wide, though it has almost disappeared in the southern quadrant. The eastern quadrant tells a different story: here the bank appears to have been levelled, its material collapsed or pushed into the fosse, and this flattened section is thought to be where the original entrance once stood, a common positioning for early medieval enclosures. Much of the interior slopes gently southward and is now thick with long grass and brambles, as is the outer edge of the enclosure from south-east around to north-north-west. It is a small site, and in places a heavily obscured one, but the earthwork endures with enough definition to read clearly as a structure, not just a natural undulation in the field.