The cairns are aligned to the sun, with Cairn T specifically engineered to capture the equinox sunrise.
The site is named after the 'Cailleach' (the Hag), a mythological figure said to have dropped these stones from her apron while jumping between the hilltops.
Extensive megalithic carvings at the site include solar symbols, spirals, and concentric circles.
Loughcrew sits at the highest point in County Meath, providing a vantage point over eighteen Irish counties on a clear day.
The passage tomb builders used corbelled roofing techniques to create high, vaulted chambers that remain stable after five millennia.
Archaeologists have identified over 30 separate burial mounds or cairns within the wider Loughcrew complex.
Loughcrew Cairns, also known as Slieve na Calliagh, comprise a group of Neolithic passage tombs situated on three distinct hilltops in County Meath. Dating back to approximately 3000 BC, the site features complex megalithic art carved directly into the stones of the chambers. Cairn T is the most significant structure, renowned for its stone roof box designed to illuminate the inner chamber during the spring and autumn equinoxes. The site predates the Egyptian pyramids by several centuries. The burial mounds are constructed from local limestone and are part of a larger prehistoric ritual landscape that includes standing stones and cairns across the Slieve na Calliagh ridge. Visitors can access the interior of Cairn T through a guided or restricted entry system depending on the season. The site remains a significant example of passage tomb architecture in the Boyne Valley region.
The entrance to Cairn T, specifically framing the stone doorway against the horizon line of the ridge.
Bring a high-powered flashlight to better inspect the detailed carvings inside the dimly lit chambers.
Wind speeds at the summit are significantly higher than at the base; carry an extra layer even on warm days.
Ensure footwear has excellent grip as the paths leading to the cairns are steep, uneven, and often muddy.
Attempting the steep hike to the summit in poor visibility or heavy rain, as the paths become slippery and the panoramic views are obscured.
Access to the interior of the principal cairn is managed seasonally; often closed or limited during winter months.
Do not touch the ancient carvings as oils from skin cause irreversible damage; stay on marked paths to prevent erosion of the burial mounds.
