Overview
The reason to turn off the R357 north-west of Athleague is a single granite boulder sitting in a driveway: the Castlestrange Stone, carved in the Iron Age with the flowing spirals of La Tène art and now a protected National Monument. It stands on a bed of pebbles, ringed by a cattle grid to keep livestock off it. Around it are the remains of Castlestrange House, on the banks of the River Suck in County Roscommon – a roofless three-storey shell with a derelict coach house and stables, while other outbuildings have been converted into a private home. The stone is one of only a handful of decorated La Tène stones known in Ireland, and it is the older and stranger thing here by two thousand years.
The Castlestrange Stone
Long before the Georgian families took residence here, this landscape was shaped by Iron Age ritual. The Castlestrange Stone is a low granite boulder whose surface is incised with the flowing spirals, trumpets and arcs that define the La Tène tradition, the Celtic art style that spread across Europe from around 300 BC to 100 AD. Nobody knows what it was for. It has no inscription and no context that survived; the assumption is that it served some religious or ritual purpose, but that is an assumption.
What is certain is the company it keeps. The stone sits in a rough straight line on the map with a small number of other La Tène carved stones: the Turoe Stone in County Galway and the Killycluggin Stone in County Cavan are always counted alongside it; the Derrykeighan Stone in County Antrim is added by some sources to make four. Whichever count you take, this is one of the rarest classes of monument in the country, and at Castlestrange you can stand over it and trace the carving with your eye.
The house and its people
The story of the estate begins in the medieval period, when the L’Estrange family constructed a fortress on the site. By the early 1700s, the Mitchell family had acquired the land and demolished the old castle, opting instead for a more refined residence suited to the changing tastes of the era.
The house visitors see today took shape in the early 19th century. By the 1830s, the three-storey structure was complete, boasting a classic L-plan layout, a slate roof, and a distinctive pedimented bellcote. The estate expanded to include functional outbuildings like a coach house and stables, reflecting the self-sufficient nature of country life at the time.
The estate’s most interesting figure came later. Aleen Isabel Cust had finished her veterinary studies in Edinburgh in 1897, only to be refused permission to sit the final examination because she was a woman. She came to Castlestrange to practise alongside the vet William Byrne, and worked in the area from 1908 to 1924 – so this is not where she trained, but it is where she built her career long before the profession would formally recognise her as Ireland’s first woman veterinary surgeon. A plaque to her was put up at the house in 2007. After Byrne’s death the property changed hands, and the Finerty family lived here into the mid-20th century before the house was gradually abandoned. The main building has been left to nature; the surviving outbuildings have been made into a private home.
What to See & Do
Exploring Castlestrange is an exercise in atmospheric history. The site is accessible to the public, and visitors are welcome to wander the grounds at their own pace.
- Walk the ruins: Circle the remaining walls of the main house to appreciate the original L-plan footprint. Look for the slate roofline fragments and the pedimented bellcote, which still punctuates the skyline. The ivy-draped windows and crumbling masonry photograph well in low light.
- Study the stone: It sits in the driveway on its bed of pebbles behind a cattle grid. Look at the better-preserved face, where the incised spirals are still sharply cut, then walk round it – the design runs unevenly over the boulder rather than to a plan.
- Look, don’t intrude, at the buildings: The coach house and stables are derelict and the converted outbuildings are someone’s home, so admire the ruined shell from the driveway and leave the private house be.
- The wider walk: The Suck Valley Way long-distance trail runs through the demesne, so the stone can be a stop on a longer riverside walk rather than a quick pull-in.
Practical Information
- Access & Hours: The grounds are on private property but are open to the public. There are no formal opening hours or admission charges. You can visit at any time during daylight hours.
- Location & Parking: The estate is north-west of Athleague, reached via the R357. Free parking is available near the gate lodge (approx. 53.5858° N, 8.2707° W).
- Facilities: There are no visitor amenities on site. Basic refreshments and amenities can be found in Athleague, just a short drive away.
- Etiquette: Please stay on designated footpaths, respect the private residences, and leave no trace. The site relies on visitor courtesy to remain accessible.
Nearby Attractions
If you are building a day trip around Castlestrange, the surrounding area offers excellent complementary stops. A short drive north-east leads to Boyle Abbey, a beautifully preserved Cistercian ruin set against the River Boyle. Combining the medieval monastic architecture of Boyle with the later country house ruins at Castlestrange creates a rich historical narrative.
For a contrast, the Georgian mansion at Castlecoote, a few kilometres south-west, is intact and open to the public in summer, where Castlestrange is a ruin left to the ivy. Give the stone itself ten minutes and it repays them: there are only a handful like it in the country, and this is one you can walk right up to.