Running roughly northeast to southwest for around 760 metres, Kevin's Lane follows a course that was almost certainly worn into the landscape by pilgrims making their way to St. Kevin's Well, one of many holy wells in Ireland associated with the sixth-century monk whose name is more famously attached to the monastic city at Glendalough nearby. The lane is defined on both sides by earthen banks, each roughly two to two and a half metres wide and averaging about one and a half metres in height, with drystone facings, walls built without mortar, preserved along substantial sections at the northeastern end. It is that physical structure, as much as any document, that speaks to the lane's age and purpose.

The history layered into this short stretch of ground is unusually legible. The original function appears to have been a pilgrim path connecting the holy well to Dunganstown church and castle. Over time, it seems to have been repurposed as the approach drive to the castle and associated house, before eventually being absorbed into the modern road. This kind of gradual reuse, sacred path becoming estate drive becoming public road, is not uncommon in Ireland, but it is rarely so traceable. The Ordnance Survey Letters, compiled by John O'Flanagan in 1928 from earlier nineteenth-century fieldwork, record the name explicitly as both 'Kevin's little road' and 'Kevin's lane', preserving in Irish topographical memory a direct link to the pilgrimage tradition that first made the route meaningful.