Deer parks were enclosures maintained by landowning families to keep deer for hunting or ornamental purposes, and they were once a fairly common feature of the Irish estate landscape. What makes this one quietly interesting is how thoroughly its outline has been absorbed into later geography. The modern townland boundaries of Kilburry West correspond closely to what the enclosure once contained, meaning the old park's shape has, in effect, been preserved in the administrative map of the land itself.

The 1840 Ordnance Survey six-inch map marks the site plainly as "Old Deer Park", suggesting that even by that date the enclosure had already fallen out of use as a functioning park. At its fullest extent, the park was a largely pentagonal shape with some irregularities, measuring roughly 860 metres northwest to southeast and around 900 metres in the other direction, and it originally reached into what is now Kilburry East townland as well. Its southeastern boundary once formed the northwestern edge of the gardens of Kilburry House, the estate to which it presumably belonged. A stream that now defines the eastern edge of Kilburry West would have run through the interior of the park. The most legible surviving feature today is the western boundary wall, built from selected rubble bonded with a rough lime mortar, the wall standing around a metre in height on its internal face. Much of it remains upstanding and reasonably intact, though overgrowth covers portions and the lower southern stretch has been reduced considerably. The northeastern edge of the original enclosure is now traced by the avenue leading to Kilburry House.