It measures roughly three metres east to west, four metres north to south, and rises less than a metre from the ground. To a passing eye it might suggest nothing more than cleared field rubble, but it is a penitential cairn, a physical marker of devotional practice that once drew people to this spot in numbers and with intent.

The cairn was associated with a pattern, the Irish term for a traditional round of prayers, typically performed on a saint's feast day, combining circuits of sacred sites with acts of penance. Patterns were communal occasions with deep pre-Christian roots, layered over centuries with Catholic observance. This particular cairn sits immediately to the south-east of a holy well, and a second penitential cairn lies just a few metres to the south-west, suggesting a defined circuit that pilgrims would have walked, pausing at each station to pray or perform a prescribed number of rounds. The wider site is not simply a well and a couple of stone piles; approximately forty metres to the south lie an early medieval church and graveyard, placing the whole ensemble within a landscape of continuous religious use stretching back well over a thousand years.