Castlepook’s Reindeer Incision
Archived: 15 September 2026
Circa 31,672 BCE, Ireland occupied a climatically unstable Late Pleistocene frontier, with open steppe-tundra, changing coastlines and uneven ice expansion. Castlepook Cave near Doneraile preserves a time-mixed fauna including mammoth, reindeer, giant deer, hyaena, Arctic fox and lemmings, showing intermittent cold-stage habitats. A reindeer femur, dated broadly to about 33,000 years ago, bears an incision interpreted as stone-tool butchery, suggesting an Upper Palaeolithic human visit. The evidence cannot establish a precise year, permanent settlement, identity, beliefs or social organisation. Any people were probably mobile foragers, while cave deposits require secure contexts, tools and sites to confirm Ireland’s earliest human presence.