The Mourne Mountains: history, culture, food and places

The history of the Mourne Mountains

The Mournes were shaped by granite intrusion into older slate around 56 million years ago, quarried for building stone from the eighteenth century, and ringed between 1904 and 1922 by the Mourne Wall, a 22-mile dry-stone boundary built to protect the catchment feeding Belfast's water supply at the Silent Valley.

The granite that gives the Mournes their pale, weathered domes pushed up through older sedimentary rock in a volcanic episode around 56 million years ago, the same event that produced the Giant's Causeway further north. Millions of years of erosion since then rounded the granite into the smooth-backed summits you see from Newcastle beach, with tors and boulder fields where the rock resisted wearing down evenly.

From the eighteenth century, that granite became the county's main export. Quarrymen worked the hillsides above Annalong, Kilkeel and Newcastle, splitting stone by hand using plug and feather wedges, and Mourne granite paved streets as far away as Liverpool and Sheffield. Stonecutters' cottages and the abandoned quarry faces above Bloody Bridge and Thomas's Mountain are still visible to anyone walking the hills, and the trade left the area with a distinct building style: granite gate posts, granite field boundaries, and the low granite cottages that still dot the foothills.

The defining structure of the range came later. Belfast's growing population needed a reliable water supply, and the Belfast Water Commissioners chose the high Mourne valleys for a reservoir. Construction of the Silent Valley began in 1923, but the boundary wall around its 9,000-acre catchment, the Mourne Wall, was built first, between 1904 and 1922, largely by unemployed local labour during a period of real hardship. It runs 22 miles over fifteen summits, including Slieve Donard, is roughly waist to shoulder height throughout, and remains one of the more improbable engineering feats in Ireland: a single continuous wall carried over some of the roughest ground in the country using nothing but hand tools and dry-stone technique.

The Silent Valley Reservoir itself opened in 1933, with a second reservoir, the Ben Crom, added upstream in 1957. Both still supply drinking water to greater Belfast, which is why swimming and dogs are restricted in parts of the catchment, and why the wall that guards it is treated locally with a degree of respect that a simple field boundary would not get.

c. 56 million years ago

Granite intrudes into the older Mourne slates, later eroded into today's summits.

18th to early 20th century

Granite quarrying becomes the area's main industry, stone shipped as far as England.

1904 to 1922

The Mourne Wall built, 22 miles around the high catchment above Kilkeel.

1923 to 1933

The Silent Valley Reservoir constructed to supply Belfast's water.

1957

The Ben Crom Reservoir added upstream of Silent Valley.

1963

C. S. Lewis dies; his childhood view of the Mournes is long credited as part of the seed of Narnia.

Culture, music and the Narnia connection

The Mournes are best known culturally for Percy French's ballad 'The Mountains of Mourne,' for C. S. Lewis's boyhood view of the range from Belfast, long said to have fed into his idea of Narnia, and more recently for the Game of Thrones filming that took place at Tollymore Forest Park.

Percy French wrote 'The Mountains of Mourne' in 1896, a comic-nostalgic song about an Irish emigrant writing home from London, and its opening line, that the Mountains of Mourne sweep down to the sea, is now the phrase everyone reaches for when describing the view from Newcastle beach. French, a Cavan-born engineer turned songwriter, never intended the song as tourist marketing, but it has done more to put the range on the map than any campaign since.

C. S. Lewis grew up in east Belfast, and by his own account the blue shape of the Mournes on the horizon was one of his earliest and most persistent images of longing, a landscape that looked like the edge of another world. Biographers and Lewis scholars generally treat this as one strand among several that fed into the imaginative geography of Narnia rather than a literal template, but the connection is well documented and the view he had as a boy is the same one you get today from the Castlereagh Hills.

More recently, Tollymore Forest Park, on the northern edge of the range near Newcastle, was used as a filming location for Game of Thrones, standing in for the haunted wood beyond Winterfell in the first series. The park's mossy oak avenue and stone bridges are easy to find on foot and require no ticket beyond the park's own entry.

Beyond those touchstones, the Mournes carry a quieter culture of hill farming, dry-stone walling and small-town Presbyterian and Catholic parish life that has changed less than the coast around it. Kilkeel and Annalong still run on the fishing calendar as much as the tourist one, and that working rhythm is part of what makes the area feel distinct from more heavily developed parts of Northern Ireland's coast.

What to eat around the Mourne Mountains

Food here runs on the sea and the hill: Mourne prawns and other shellfish landed at Kilkeel and Annalong, Down beef and lamb from farms in the foothills, and a small but serious craft brewing scene led by Whitewater Brewery in Kilkeel.

Kilkeel is Northern Ireland's largest fishing port, and Annalong a few miles up the coast is its quieter working sibling. Both land langoustine, known locally and on menus across Ireland as Mourne prawns, along with crab, scallops and whitefish. The prawns in particular have built a reputation well beyond the county, and you will find them named specifically on menus in Belfast and Dublin rather than listed as generic shellfish.

Inland, the Mourne and Down countryside is beef and sheep country, grazed on grass that stays green most of the year thanks to Atlantic rain. Down lamb and beef turn up on menus in Newcastle and Rostrevor without needing much dressing up, and it is worth ordering plainly here: a chop or a simple roast rather than something over-worked.

For a sit-down seafood meal, the Belfast branch of Mourne Seafood Bar is the best-known name attached to the area's shellfish, since the restaurant grows its own oysters and mussels on beds along the County Down coast near Carlingford and Dundrum and serves them a few hours later. It is worth knowing even if your trip stays in the mountains rather than the city, because it is the clearest public face of what the coast below the Mournes actually produces.

Kilkeel and Annalong also still run traditional fish and chip shops geared to the fishing fleet rather than to visitors, and a plate at one of those, eaten looking at the harbour, is as honest a meal as the area offers.

Mourne prawns

Langoustine landed at Kilkeel and Annalong, the area's best-known seafood export.

Down beef and lamb

Grass-fed on the foothill farms, served plainly on menus in Newcastle and Rostrevor.

Crab and whitefish

Landed alongside the prawns at Kilkeel, Northern Ireland's largest fishing port.

Harbour fish and chips

Annalong and Kilkeel both keep working chip shops geared to the fleet, not the tour bus.

Beer and pubs around the Mournes

Whitewater Brewery in Kilkeel has been the area's main craft brewer since 2008, and the pubs of Newcastle, Rostrevor and Kilkeel remain small, local rooms built around fishing and hill-walking crowds rather than a bar-crawl scene.

Whitewater Brewery, founded in Kilkeel in 2008, is the name most associated with Mourne beer, brewing a range that includes its Belfast Ale and seasonal cask beers distributed to bars across Northern Ireland. It is a working brewery rather than a visitor attraction, so check current tour or shop access before planning a stop.

Pubs in Newcastle cluster around the seafront and Main Street, filling with walkers off the hills by late afternoon in season. Rostrevor, on the quieter western side of the range facing Carlingford Lough, has a couple of long-standing pubs that lean into live music at weekends. None of this is a nightlife scene in the Belfast or Dublin sense, and that is more or less the point: an evening pint here is the end of a day outdoors, not the start of one out.

As with the rest of Northern Ireland, drinks are priced and served in pounds sterling, and a pint of stout is poured and settled the same unhurried way it is across the border in the Republic.

The wall, the peaks and the coast

The range holds twelve peaks over 600 metres inside roughly 90 square miles, crossed by the Mourne Wall and by the Brandy Pad, a historic smuggling route through Hare's Gap, with Slieve Donard as the highest point and Silent Valley as the main reservoir and visitor site.

Slieve Donard, at 850 metres, is Northern Ireland's highest mountain and the range's obvious headline climb, usually walked from Newcastle via the Glen River path and the Mourne Wall, a route of around five hours return that is straightforward in good weather and genuinely serious in poor visibility or wind, since the summit sits close to steep ground on more than one side.

Hare's Gap, on the northern side of the range, is the access point for the Brandy Pad, a route used through the eighteenth and nineteenth centuries by smugglers moving brandy, tobacco, silk and other contraband up from the coast to avoid customs at the ports. It is now one of the range's classic walking routes, threading between Slieve Bearnagh and Slieve Commedagh with views down to Ben Crom and Silent Valley.

Silent Valley itself, reached by road from Kilkeel, has a visitor centre, café and easy walking trails along the reservoir shore, and is the most accessible way to see the Mourne Wall and the scale of the catchment up close without committing to a full mountain day. The Ben Crom Reservoir above it is reachable on foot or, seasonally, by a small tour bus.

This is genuine mountain terrain rather than gentle hill walking. Weather changes fast, cloud drops onto the tops with little warning, and the granite becomes slick when wet. Anyone heading above the tree line should carry a map, a waterproof layer regardless of the forecast at sea level, and should tell someone their planned route, the same precautions locals take as a matter of course rather than an overreaction.

Getting there and getting around

Drive from Belfast in about an hour or from Dublin in about 90 minutes, base in Newcastle or Rostrevor, and remember that Northern Ireland runs on pounds sterling and miles rather than euro and kilometres.

Most visitors arrive by road. Newcastle is about an hour's drive south of Belfast on the A24 and A2, and about 90 minutes north of Dublin on the M1 and A1, crossing the border without any formal checkpoint but with a currency change that catches people out: bring or withdraw pounds sterling once you cross, since euro is not accepted in shops or pubs here.

Newcastle is the practical base for the range, with the Slieve Donard Hotel, a large Victorian seafront hotel opened in 1898, as its best-known address and the anchor of the town's promenade. Rostrevor, on the western side facing Carlingford Lough, is the quieter alternative, with Kilbroney Park and its ancient oaks on its doorstep and views across the water to County Louth in the Republic.

Kilkeel and Annalong, on the southern coast road, are working harbour towns rather than resort towns, worth a stop for food and the fishing fleet rather than an overnight stay for most visitors. Castlewellan, inland to the north, has a large forest park with an arboretum and lake loop that suits a slower half day.

Roads through the range are narrow and winding once you leave the coast, so allow more time than the mileage suggests, and treat any hill walk as a full-day commitment with proper boots and layers, not an add-on to a driving day.

Eleven places worth planning a day around

Ordered roughly from the coast into the hills, with what each one actually is, why we send people, and what to know before you go.

1. 01 · Above Newcastle, via the Glen River path

   Slieve Donard

   Northern Ireland's highest mountain at 850 metres, usually climbed from the town via the Mourne Wall.

   The range's obvious summit day, and the views from the top take in the Isle of Man and Scotland on a clear day.

   PlanningAllow around five hours return. Check the forecast and mountain conditions before setting out, and start early.

2. 02 · Crossing fifteen summits, most accessible near Silent Valley and Hare's Gap

   The Mourne Wall

   A 22-mile dry-stone wall built between 1904 and 1922 around Belfast's water catchment.

   The single structure that explains the range's history better than any museum, and it doubles as a walking handrail on the high tops.

   PlanningFree and open at any point. The Silent Valley stretch is the easiest short walk to see it up close.

3. 03 · Inland from Kilkeel, reached by road

   Silent Valley Reservoir

   A reservoir and visitor centre supplying Belfast's water since 1933, with shoreline trails and views of the Mourne Wall.

   The easiest way to see the wall and the scale of the mountains without a full hill walk.

   PlanningVisitor centre and café on site. A seasonal bus can run up to the Ben Crom Reservoir further into the valley.

4. 04 · Northern side of the range, accessed from the Trassey Track

   Hare's Gap and the Brandy Pad

   A mountain pass and the historic smuggling route that runs through it toward Slieve Bearnagh and Slieve Commedagh.

   One of the finest walking routes in the range, with a genuine history of contraband rather than a manufactured one.

   PlanningA serious day walk with real elevation. Not a route for poor visibility or first-time hillwalkers without a guide.

5. 05 · Just north of Newcastle

   Tollymore Forest Park

   A historic forest park with an oak avenue, stone bridges and rivers, used as a Game of Thrones filming location.

   An easy, well-signed walk that does not require mountain gear, with genuine screen history for anyone who wants it.

   PlanningEntry fee for the park. Waymarked trails suit all fitness levels.

6. 06 · Castlewellan, inland from Newcastle

   Castlewellan Forest Park

   A large forest park with an arboretum, walled garden and a lake loop walk.

   A slower, flatter half day for anyone who has had enough hill climbing, and the arboretum is a genuine collection rather than a garden centre display.

   PlanningEntry fee for the park. The lake loop is roughly flat and suits all ages.

7. 07 · Newcastle, at the foot of Slieve Donard

   Royal County Down Golf Club

   A championship links course founded in 1889, consistently ranked among the best golf courses in the world.

   Pilgrimage golf, with the Mournes sweeping down behind the greens on the front nine.

   PlanningVisitor tee times are limited and should be booked well ahead, especially for summer.

8. 08 · Newcastle seafront

   Slieve Donard Hotel

   A large Victorian hotel opened in 1898, anchoring the town's promenade beside Royal County Down.

   The area's best-known address and a straightforward base for golf, the beach and the mountains alike.

   PlanningBook golf packages in advance if combining a stay with tee times next door.

9. 09 · Southern coast road, about 20 minutes from Newcastle

   Kilkeel Harbour

   Northern Ireland's largest fishing port, landing Mourne prawns, crab and whitefish.

   A working harbour rather than a photo stop, and the source of the prawns you will see named on menus across the country.

   PlanningBest visited late morning to early afternoon when the boats are in and the harbour is active.

10. 10 · Western side of the range, on Carlingford Lough

    Rostrevor and Kilbroney Park

    A quiet village with ancient oak woodland, mountain bike trails and views across the lough to County Louth.

    The calmer, less developed alternative to Newcastle, with genuine old-growth woodland on its doorstep.

    PlanningKilbroney Park has a car park and waymarked trails for both walking and mountain biking.

11. 11 · Bank Street, Belfast, about an hour north of Newcastle

    Mourne Seafood Bar

    A Belfast seafood restaurant that farms its own oysters and mussels on beds along the County Down coast.

    The clearest public face of what the coast below the Mournes actually produces, worth the detour into the city.

    PlanningLunch is generally easier to book than dinner. Ask what came in from Dundrum that morning.