Things to Do in Offaly: The Faithful County's Hidden Treasures

Offaly is the county most people drive through on the way to Galway, which is why it stays quiet. Its highlights are Clonmacnoise, one of Ireland's great monastic sites on the Shannon, Birr Castle with its giant Victorian telescope, the walkable raised bogs, and the Slieve Bloom Mountains - the Wicklow hills without the crowds.

Offaly is the county people drive through on the way to Galway, which is exactly why it stays quiet. Slow down and you get one of Ireland's great monastic sites, a castle with a Victorian telescope you can still walk under, walkable bog and a mountain range with none of the Wicklow crowds. Here's what's worth your time, and how to make a proper day of it.

The county sits in the middle of the country, bordered by the Shannon to the west and the Slieve Bloom Mountains to the south. You can see the headline sights in a long day from Dublin or Galway, but Offaly rewards an overnight: the distances are short and the roads are empty.

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What are the must-see things to do in Offaly?

Clonmacnoise monastic site

Founded by St Ciarán around 544 on a bend of the Shannon, Clonmacnoise grew into one of medieval Europe's great centres of learning before Viking and Norman raids wore it down. What's left is a cluster of churches, two round towers and three high crosses, with the originals moved into the visitor centre and replicas standing in their place outside.

Go in the morning before the coaches arrive, allow two hours, and read the crosses panel by panel. The OPW site runs guided tours in summer and the riverside setting is the whole point, so pick a clear day. Check opening times and admission on the official Heritage Ireland page before you set off.

Birr Castle Demesne and the Great Telescope

The Parsons family have lived at Birr since the 1620s, and in the 1840s the third Earl of Rosse built the Leviathan of Parsonstown here, the largest telescope in the world for over 70 years. You can walk right under the restored instrument, then lose an afternoon in the gardens, which hold some of the tallest box hedges in the world and a tree collection that runs from snowdrops to autumn colour.

The Science Centre tells the story of the family's astronomy and photography, which makes this a strong wet-day option. Allow three hours, and check the seasonal hours and events on the Birr Castle site.

The Slieve Bloom Mountains

Straddling the Offaly and Laois border, the Slieve Blooms are among the oldest mountains in Europe and far gentler than the Wicklow hills. The Glenbarrow loop near Rosenallis is the pick: about 8km of forest track and open moor that takes in the Glenbarrow waterfall, two to three hours at an easy pace.

There's also a growing network of off-road mountain-bike trails centred on the village of Kinnitty. Wear boots, the ground holds water, and plan routes using the Slieve Bloom trail guides. If you're chasing more routes, our guide to the best hiking trails in Offaly goes deeper on the walks.

Lough Boora Discovery Park

A former Bord na Móna peatland near Tullamore, now 2,000 hectares of walking and cycling trails, fishing lakes and large-scale outdoor sculpture set into the cutaway bog. It's flat, buggy-friendly and free to enter, with bike hire on site in season.

Families head for the fairy trail; everyone else comes for the sculpture park and the birdlife on the wetlands. It's an easy half day, and a good rain-light alternative to the mountains. Trail maps are on the Lough Boora site.

Tullamore D.E.W.

The whiskey that put the county on bar shelves worldwide, with a visitor experience in the old bonded warehouse on the Grand Canal in Tullamore town. Tours run roughly an hour and finish with a tasting, and the groups are smaller than the big Dublin distilleries.

Book ahead in summer, especially at weekends. Confirm tour times directly with Tullamore D.E.W. Tullamore makes a natural base for a night, and there's plenty more to do around town in our things to do in Tullamore guide.

Where are Offaly's quieter corners?

Leap Castle

Near Roscrea, Leap is widely billed as Ireland's most haunted castle, a 13th-century O'Carroll stronghold where an oubliette was found stacked with human remains. It's a private home, so visits are by arrangement with the owner rather than a turnstile operation, and the stories come with the territory. Ring ahead; it is not a drop-in.

Clara Bog

One of the best-preserved raised bogs in western Europe, with a boardwalk loop of about a kilometre that gets you out over the living bog without sinking into it. Twenty to thirty minutes round, and the colours lift after a shower. There's a small visitor centre in Clara village that explains how a raised bog actually works.

Durrow Abbey

Founded by St Columba, Durrow gave its name to the Book of Durrow, an illuminated gospel now held at Trinity College Dublin. The 9th-century high cross and the church sit in quiet parkland north of Tullamore, with far fewer visitors than Clonmacnoise and an unhurried feel to match.

The Shannon at Banagher and Shannonbridge

Offaly's western edge is all river. You can hire a cruiser with no licence required from Banagher and potter the quiet stretch up towards Shannonbridge and Clonmacnoise from the water, which is the way the monks would have arrived. Callows and reed beds along here are good for birdwatching, with the odd white-tailed eagle reported on the river.

Book a guided tour to Clonmacnoise

If you'd rather arrive the way the monks did, the private boat tour on the River Shannon to Clonmacnoise from Athlone brings you up the river to the monastic site by water rather than by road. It's a small-group splurge, from €300, and worth booking ahead in summer.

How can you make a day of it nearby?

Offaly is easy to combine with its neighbours. From the Shannon side, Athlone is fifteen minutes from Clonmacnoise and worth a wander, see our things to do in Athlone guide. To the south the Slieve Blooms spill into Laois, covered in our things to do in Laois guide, and Westmeath's lakes are a short hop north if you want a second day.

When should you visit, and what's on?

Late spring to early autumn is the sweet spot, when the gardens, bog and mountains are at their best and the festivals cluster. A few fixtures worth planning around, but always confirm dates with the organiser before you travel.

• Birr Vintage Week and Arts Festival (August): a long-running town festival of vintage cars, street theatre, music and art, going since 1968.
• Tullamore Show (August): one of the largest one-day agricultural shows in the country, with livestock, machinery and food.
• Slieve Bloom Walking Festival (typically spring and autumn): guided walks of varying lengths with a sociable finish in the local pubs.
• Festivals at Birr Castle: the demesne hosts events across the year, from open-air theatre to family days; check the castle's listings.

Getting there and getting around

Offaly has no railway station of its own for the main towns; the nearest mainline stops are Tullamore (on the Dublin to Galway line) and Athlone just over the border in Westmeath. From Dublin it's roughly 90 minutes by road to Tullamore or Birr. A car is the practical way to link the sights, as the best of the county is rural and bus links between towns are limited. For the full picture of what's open and when, the official Discover Ireland Offaly pages are a reliable starting point.

Frequently asked questions

What is Offaly best known for? Clonmacnoise, the great early-medieval monastic site on the Shannon, and Tullamore D.E.W. whiskey. Birr Castle's giant Victorian telescope runs them close.

Is one day enough for Offaly? You can see Clonmacnoise and Birr Castle in a day from Dublin or Galway, but two days lets you add the Slieve Blooms, Lough Boora and a distillery tour without rushing.

What's the best free thing to do in Offaly? Lough Boora Discovery Park and the Clara Bog boardwalk are both free, flat and family-friendly. The Slieve Bloom walks are free too if you bring your own boots.

How do you get to Offaly without a car? Trains serve Tullamore on the Dublin to Galway line, and Athlone sits just across the border. To reach Clonmacnoise and the rural sights you'll want a guided tour or a hire car from there.

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More great Irish days out

Heading further afield? A couple of Ireland's most-booked experiences, all an easy trip from Leinster:

Guinness Storehouse, Dublin. The St James's Gate tour finishes with a pint in the Gravity Bar and its rooftop views over the city. Book a time slot ahead, it sells out at weekends.

Where to stay in Offaly

Making a night of it? Browse hotels, guesthouses and places to stay in Offaly:

See places to stay in Offaly on Expedia

Heritage sites in Offaly

Offaly has 4,879 recorded archaeological monuments, and 2 are set up to visit. See the historic sites in Offaly worth visiting →

Walking trails in Offaly

Offaly has 22 waymarked walking trails on the national register, graded and mapped. See the walking trails in Offaly worth lacing up for →

Nature reserves in Offaly

Offaly has 4 nature reserves open to the public. See the wild places worth visiting in Offaly →

Historic buildings in Offaly

Offaly has 1,196 recorded NIAH buildings, 22 of them rated of National or International importance, from Georgian houses and churches to bridges and mills. See the historic buildings in Offaly worth seeking out →

Top things to do in Offaly

Lemanaghan Monastic Site, In 645, Diarmait, King of Ireland, granted this site to the monks of Clonmacnoise after they prayed successfully for his victory in battle.

Mick The Miller Monument, This is a bronze sculpture of greyhound Mick The Miller, who was born in Killeigh, County Offaly, in June 1926 and who went on to become the most famous greyhound in the world.

Birr Theatre & Arts Centre, Situated in the tree lined Oxmantown Mall, Birr Theatre and Arts Centre is a dedicated purpose built theatre which dates from 1888.

Birr Equestrian Centre, In County Offaly offers lessons for adults and children, pony camps, hourly treks on their 160 acre farm and also treks to explore the magnificent Slieve Bloom Mountains.

Leap Castle, Through turbulent centuries, Leap Castle kept watch for the lords of Ely O'Carroll and still stands fortress-like on its perch overlooking a vast stretch of the countryside.

Glasshammer Studios, Led by artist Michelle O'Donnell, invites you to the scenic heart of Ireland.

Mountlucas Wind Farm, Features a sensory garden which measures 1400 square meters and is for children and adults alike, to stop and enjoy their visit.

Tullamore D.E.W. Distillery Experience, The Tullamore D.E.W.

What's on

Birr Vintage Week & Arts Festival 2026
Fri 31 July · Birr · Festival · Free

Events & attractions: Fáilte Ireland Open Data (failteireland.ie), CC BY 4.0.