At the top of White Mountain, evidence of prehistoric life is limited. This is likely the result of a lack of archaeological research in this area. Research on the Carlow side of the Blackstairs has uncovered houses and hut sites, rock art and standing stones, enclosures, and field systems. One reason the Carlow side has been so heavily investigated can be seen in the sharp differences in the landscapes on each side. While the Wexford side of White Mountain is covered in the evergreen of pine plantations, the Carlow side is a palette of grey scree and colour-changing heather. A wildfire in 2010 damaged trees and burnt plants there, making it easier to identify archaeological features that had been hidden underneath. Given the extent of evidence on the Carlow slopes, it is likely that similar levels of human activity occurred on the Wexford side. Further research will be required before this can be confirmed.
The most significant archaeological remains sitting along the ridge of White Mountain is an ancient monument known as the Poul Art ring-cairn. Ring-cairns were an important part of Early Bronze Age burial traditions from about 4,500 years ago. Once a proud mound of stones, it marks the final resting place of someone long forgotten. It was likely built with stones gathered from the surrounding hillside. It measures nineteen metres across and two metres high. Today, it is hidden by grass and heather. If you are not paying attention, you could easily pass by without noticing.