Poulaphouca Reservoir
Poulaphouca Reservoir, also known as the Blessington Lakes, is one of the largest artificial lakes in Ireland and a striking presence in the Wicklow uplands. Created in the 1940s by damming the River Liffey at the Poulaphouca Falls, the reservoir stretches across roughly 5,000 acres of flooded valley and serves as a vital water supply for Dublin and the surrounding counties. It is also the source of hydroelectric power generated at the Poulaphouca Power Station, making it one of the most significant pieces of mid-twentieth century infrastructure on the island. Despite its functional origins, it has grown into a beloved recreational destination, drawing walkers, cyclists, anglers, birdwatchers, and those simply seeking the restorative qualities of open water and Wicklow sky.
The history of this place is layered with both engineering ambition and human loss. Before the reservoir was filled, the valley contained the village of Baltyboys and several other smaller settlements, farms, and townlands that were compulsorily purchased and cleared to make way for the rising water. Dozens of families were displaced, homes demolished, and a way of rural life erased. The reservoir began filling between 1940 and 1944, and some accounts suggest that during periods of prolonged drought, when water levels drop significantly, traces of the old roads, field boundaries, and even foundations of former dwellings re-emerge from the shallows — a ghostly reappearance that never fails to provoke reflection on the cost of progress. The name Poulaphouca itself derives from the Irish Poll an Phúca, meaning "the hole of the Pooka," a reference to the legendary shapeshifting spirit of Irish folklore said to haunt the original waterfall. The Pooka, variously imagined as a dark horse, a goblin, or a creature of capricious mischief, gave the site a mythic resonance long before the dam was ever built.
In person, the reservoir is a place of quietly dramatic beauty. The water is broad and mirror-like on calm days, reflecting the pale Irish sky and the rolling hills of County Wicklow and County Kildare that hem it on all sides. The shoreline is deeply irregular, with inlets, peninsulas, and wooded promontories creating an almost fjord-like sense of enclosure and discovery as you move around it. On still mornings, the silence is broken only by birdsong, the occasional call of a grebe or heron, and the soft lapping of water against stone. When wind moves across the reservoir, the surface breaks into silver chop and the surrounding reed beds hiss and bend. In autumn, the surrounding oakwood and bracken slopes shift through amber and copper, making it one of the most atmospheric lakes in the eastern part of the country.
The surrounding landscape is a meeting point between the open, bog-edged uplands of Wicklow and the more pastoral, hedge-rowed countryside of Kildare. The market town of Blessington lies close to the northern end of the reservoir and serves as the primary hub for visitors, offering cafés, shops, and accommodation. From Blessington, a scenic lakeside road traces part of the reservoir's perimeter, and there are several access points for walking trails, fishing stands, and a watersports centre operated by Waterways Ireland. The Wicklow Mountains National Park lies to the south and east, meaning that the reservoir sits at a kind of gateway between lowland amenity and wilder mountain terrain.
Visiting is straightforward from Dublin, which lies roughly 30 kilometres to the northeast. The N81 national road connects the capital to Blessington, and from there the reservoir is immediately accessible. There is no single formal entrance — several car parks and pull-ins along the lakeshore road allow access at different points. The Watersports Centre at the southern end of the lake near the dam is a good starting point for those interested in kayaking or sailing, while anglers favour the quieter western shores where brown trout and pike can be found. The reservoir is fishable under licence issued by Inland Fisheries Ireland. There is no significant admission charge for general access to the shoreline and trails. The lake can be visited year-round, but spring and autumn offer particularly fine conditions — summer weekends bring crowds from Dublin, which somewhat diminishes the sense of solitude.
One of the more unusual and poignant aspects of the reservoir is its relationship with memory and disappearance. Local oral tradition has long preserved the names and stories of the submerged townlands, and there have been community efforts over the decades to document what was lost. Occasional exhibitions in Blessington and broader Wicklow have featured photographs of the pre-flooding valley, old maps, and testimonies from the descendants of displaced families. The idea that an entire inhabited landscape exists beneath the water — that roads once driven by horses and carts now lie silently under fathoms of Liffey water — gives the place a melancholy depth that purely natural lakes cannot possess. It is, in this sense, a lake that carries its own history underwater.