The quarry supplied approximately 7 million tons of stone for the construction of the 1.5-mile-long Holyhead Breakwater between 1845 and 1873.
The park's lake, known as Llyn Llwyn-Hwfa, is a flooded quarry pit that reaches significant depths.
The site is part of the Anglesey Area of Outstanding Natural Beauty (AONB).
Rare chough populations, a member of the crow family, are frequently spotted nesting in the nearby coastal cliffs.
The park provides direct access to the summit of Mynydd Twr (Holyhead Mountain), the highest point on the island of Anglesey.
Remnants of original stone-crushing equipment and quarry tracks remain visible throughout the trail network.
Breakwater Country Park is situated in a former granite quarry that once provided stone for the construction of the Holyhead Breakwater. The site features a large lake, which serves as a center for fishing, surrounded by diverse habitats including heathland and rocky cliffs. It serves as a gateway to the Holyhead Mountain range and the North Wales Path. Visitors can observe various bird species and occasional seal sightings along the adjacent coastline. The park includes an industrial heritage center highlighting the site's role in local quarrying history. Trails range from accessible gravel paths to steeper, more challenging ascents towards the summit of Holyhead Mountain. The site is managed by the Isle of Anglesey County Council as a recreational countryside area.
The elevated viewing point overlooking the flooded quarry lake with the breakwater visible in the background.
Bring binoculars as the cliffside paths offer excellent vantage points for maritime birdwatching.
Wear sturdy, waterproof hiking boots if you plan to venture beyond the main lake loop onto the mountain trails.
Check local weather forecasts before visiting, as exposed cliffside paths can become high-wind zones.
Attempting the steep mountain scramble in poor visibility or wet conditions without proper equipment.
Keep dogs on a lead in areas with nesting birds or grazing livestock; follow Leave No Trace principles.
