Less remarked upon is the fact that the site also contains a recorded field boundary, a monument category so commonplace across the Irish landscape that it tends to disappear into the background, yet one that can carry as much historical weight as any tower house or passage tomb.

Field boundaries are among the oldest persistent features in the Irish countryside. They range from prehistoric stone walls and earthen banks to post-medieval ditches and hedgerows, and distinguishing one period from another often requires detailed survey work. At Craggaunowen, where the surrounding landscape has been subject to considerable archaeological attention owing to the complex itself, a boundary of this kind sits quietly within a setting already layered with evidence of long human occupation. The broader area around Craggaunowen has associations with the Hunt Collection and the late John Hunt, the antiquarian and art collector who was instrumental in developing the site during the 1960s, though the field boundary itself predates any such modern intervention and belongs to a longer, less easily narrated history of land management and division in east Clare.