This possible ditch-barrow at Knocklong West measures roughly six metres in diameter and has never appeared on Ordnance Survey Ireland historic maps, meaning it existed entirely outside the formal archaeological record until relatively recently. A ditch-barrow is a burial monument, typically of prehistoric origin, defined by a shallow encircling ditch rather than a substantial earthen mound, and this one sits within reclaimed wet pasture, the kind of low-lying ground that tends to swallow surface traces quietly over centuries.

The site came to light not through excavation or fieldwork but through the scrutiny of aerial photographs taken on 3 November 1984 during a survey conducted for the Bórd Gáis Éireann gas pipeline, working from images at a scale of 1 to 10,000. It was that infrastructural photography, commissioned for entirely practical reasons, that preserved the first recorded evidence of the monument. The feature shows up as a circular cropmark, the kind of subtle discolouration in vegetation that forms when buried ditches or soil disturbances alter how crops or grass grow above them, and which becomes legible only from altitude and in the right light and season. A Digital Globe orthoimage taken between 2011 and 2013 confirmed the cropmark, and a faint trace remained visible on a Google Earth image dated 19 March 2015. The site is not isolated; two further possible ditch-barrows lie roughly 100 metres to the north-west, and another sits immediately to the west, suggesting this corner of Knocklong West may have held some significance in the landscape during the period when such monuments were constructed. The record was compiled by Fiona Rooney and uploaded to the national monuments database in June 2021.

There is nothing to see at ground level in any conventional sense. The field gives no outward indication of what lies beneath, and without the aerial perspective the monument simply does not register. Anyone with a genuine interest in the site would do best to approach it through the orthoimage record rather than in person, as the cropmark is a product of specific atmospheric and seasonal conditions that cannot be reliably reproduced on a given visit. The surrounding pasture is low and open, and the broader Knocklong area has its own quiet layers of archaeological interest, but this particular monument rewards patience with a screen more readily than patience with a map and a pair of boots.