Lough Key
Lough Key is a stunning freshwater lake situated in County Roscommon in the west of Ireland, lying just to the east of the town of Boyle. It is one of the most picturesque loughs in Ireland, covering approximately 350 hectares and dotted with around thirty small islands, many of which are wooded and contribute to the lake's remarkably romantic, almost fairy-tale character. The lake and its surrounding forest park make it one of the most popular natural amenities in the northwest of Ireland, drawing visitors who come for walking, cycling, boating, and simply absorbing the extraordinary beauty of the landscape. The centrepiece of the experience for many visitors is Lough Key Forest and Activity Park, a managed estate that wraps around the lake's southern shore and provides infrastructure for outdoor recreation while preserving the area's ecological and historical richness.
The history of Lough Key stretches back many centuries and is deeply intertwined with the story of Irish monasticism and Gaelic lordship. Trinity Island, one of the lake's larger islands, was home to a Premonstratensian abbey founded in the twelfth century, and the ruins that remain give an atmospheric hint of the religious life once conducted on these waters. The lake and surrounding territory were historically associated with the MacDermot clan, who were powerful Gaelic lords of Moylurg and maintained a castle on Rock Island, sometimes called Castle Island, which sits prominently in the water near the shore. This castle became the backdrop for one of the most poignant love stories in Irish literary tradition: the tale of Una MacDermot and Tomás Costello, sometimes called the Irish Romeo and Juliet. Una, forbidden by her father from marrying Tomás, died of a broken heart, and when Tomás came to mourn at her grave on Trinity Island and lay down beside her, two trees reportedly grew from their graves and intertwined overhead — a story that has been retold in Irish poetry and song for generations.
The landscape around Lough Key is one of exceptional natural beauty, shaped by glaciation and richly mantled in broadleaf and conifer forest. The forest park itself contains oak, ash, beech, and a variety of conifers, and the woodland paths wind between towering trees with filtered light creating an atmosphere of peaceful seclusion. In autumn the whole area blazes with colour, making it one of the finest seasonal spectacles in Connacht. The lake surface itself is typically calm and reflective, mirroring the wooded islands and the frequently dramatic Irish sky above. Birdsong fills the air — great tits, robins, woodpigeons, and occasionally the flash of a kingfisher near the water's edge. The smell of damp leaf litter, moss, and lake water mingles to produce that particularly Irish sensory experience of a wet woodland by still water.
The broader surrounding area speaks volumes about the depth of history in this part of Connacht. The town of Boyle lies barely two kilometres to the west and is home to Boyle Abbey, one of the finest surviving Cistercian ruins in Ireland, founded in the twelfth century. The ruins are impressively preserved and managed by the Office of Public Works, with remarkable Romanesque and early Gothic stonework. Roscommon itself is a county replete with ancient sites, including Rathcroghan near Tulsk, the mythological seat of the kings of Connacht and one of the most significant unexcavated archaeological complexes in Europe. The wider landscape is one of rolling drumlin countryside, small farms, bogs, and river meadows, with the River Boyle connecting the lake to Lough Gara further upstream and ultimately draining into the Shannon system to the south.
Visiting Lough Key Forest and Activity Park is straightforward and well catered for. The park is accessible from the N4 Dublin to Sligo road, which passes close by and makes it reachable by car in roughly two and a half hours from Dublin. There is a car park with an admission fee for vehicles entering the forest park, and the facilities include a café, toilet blocks, children's play areas, a treetop walk, a bog garden, a wishing chair, and boat hire in the warmer months. Cycling trails and walking routes of varying lengths wind through the estate, and the full loop around the accessible shore areas gives a satisfying half-day outing. The park is open year-round, though some activities and boat hire are seasonal. Summer months are naturally busiest, but spring and autumn visits are particularly rewarding for those who prefer quieter paths and dramatic natural colour.
One of the more unusual features of the park is the Moylurg Tower, a nineteenth-century folly built on a high point within the estate, which offers panoramic views over the lake and its islands on a clear day and provides a tangible link to the era when the surrounding land formed part of the Rockingham Estate. The estate was owned by the King family, later the Kings-Harman family, Anglo-Irish landlords who built Rockingham House on the lakeside in the early nineteenth century to designs attributed to John Nash. The house burned down in 1957 after a period of decline, and its basement and underground passages — through which servants once moved invisibly beneath the formal life of the great house — can still be explored by visitors today, a genuinely eerie and fascinating remnant of the Ascendancy era hidden beneath the forest floor.