Greencastle Travel Guide

Greencastle stands as a commanding medieval fortress on the northern shore of Carlingford Lough, dating primarily from the 13th century. Built likely by Hugh de Lacy to guard the strategic narrow entrance to the lough, it served as a counterpart to Carlingford Castle across the water. The castle’s original design included a rectangular curtain wall with four corner towers, of which only two bases remain today. The imposing four-storey keep, measuring 18 by 8.5 meters internally, reflects architectural phases from the 13th to the 16th centuries, bearing witness to centuries of military and political history.

Throughout its history, Greencastle was a focal point of conflict and power struggles. It was held by Richard de Burgh, Earl of Ulster, in the late 13th and early 14th centuries and was attacked and taken by Edward Bruce in 1316 during his invasion of Ulster. The castle endured several Irish assaults in the late 14th century and remained an English garrison well into the 1590s. It was also governed by notable figures such as the Earl of Kildare and Nicholas Bagenal of Newry. The castle fell into ruin after a Cromwellian bombardment aimed at preventing its use by rebel forces.

Excavations conducted between 1966 and 1970 uncovered layers of occupation predating the stone castle, including the motte from an earlier Norman wooden Motte and Bailey Castle. These findings enrich the understanding of the site’s long-standing strategic importance. Today, Greencastle is a state-care historic monument, preserved as a cultural heritage site within the Newry and Mourne District. Interpretive boards at the site provide historical context, enhancing visitor appreciation of the castle’s layered past.

Perched on a rocky promontory overlooking Carlingford Lough, Greencastle offers striking views across the water and towards the Mourne Mountains. The adjacent wooden pier and stone quay serve as the ferry terminal for the car ferry linking Greencastle with Greenore on the opposite shore, maintaining the site’s historic role as a transportation hub. The surrounding landscape is tranquil, with a few fishermen’s houses and holiday homes scattered nearby, preserving the area’s rural charm.

Visitors to Greencastle can explore the castle ruins and enjoy the peaceful coastal environment. Access involves some uneven terrain and rock-cut ditches, limiting wheelchair accessibility and posing challenges for those with mobility difficulties. Children under 16 must be accompanied. On-site parking is available, and admission to the castle is free, making it an accessible cultural outing. The site’s combination of history, natural beauty, and active ferry service creates a unique atmosphere.

Greencastle remains a vivid reminder of the medieval Norman presence in Ulster and the turbulent history of the region. Its strategic location, architectural remnants, and connection to notable historical figures and events contribute to its importance as a cultural heritage landmark. The castle’s enduring silhouette against the backdrop of Carlingford Lough continues to inspire visitors and historians alike.