Cooley & Mournes
Two granite mountain ranges separated by Carlingford Lough and connected by a ferry crossing — where the Cooley Mountains of County Louth meet the Mournes of County Down in a single, cross-border walking adventure.
About the Region
The Cooley and Mournes form one of Ireland's most distinctive walking journeys: two mountain ranges, two jurisdictions, one unforgettable crossing. The Cooley Mountains rise from the Louth coast crowned by Slieve Foy, while across the water, the Mourne Mountains of County Down lift higher. The ferry crossing Carlingford Lough is not just transport but a threshold between two Irelands. You begin in medieval Carlingford, walk the legends of the Cooley Peninsula where the ancient Táin saga unfolded, cross by ferry, and spend days in the higher Mournes. The Mourne Wall — a 35km drystone structure linking fifteen summits — becomes your journey's spine. C.S. Lewis spent childhood summers here building Narnia from the very landscape you'll walk through.
Quick Facts
The Cooley Side: Myth and Medieval Heritage
The Cooley Peninsula juts into the Irish Sea between Dundalk Bay and Carlingford Lough, crowned by Slieve Foy at 589 metres. The Cooley Way, a circuit walk of the peninsula, takes you through landscape steeped in Irish mythology. This is where the Táin — the great cattle raid of Irish legend — unfolded; where Cú Chulainn defended the ford against an entire army.
Carlingford sits at the base of the peninsula like a perfectly preserved medieval town. The stone walls still stand. King John's Castle commands the lough. The gate towers remain. The narrow streets, the small harbour where oysters have been farmed for generations show this was once a Norman stronghold of real consequence.
From Carlingford, you walk the foothills and ridges. The views across the lough grow more spectacular with each ascent. On clear days, you see the Mournes in full relief. The Mourne Wall catches the light, the rock faces gleam, Slieve Donard pulls your eye like a magnet.
The Carlingford Lough Ferry is a 20-minute sailing between Greenore (County Louth) and Greencastle (County Down). One mile of water takes you from one Ireland to another. The Cooley Mountains fall away behind you. The Mournes rise ahead. It's one of the most memorable transitions in Irish walking.
The Mourne Mountains are higher, rockier, more austere than Cooley. The Mourne Wall is a 35-kilometre dry-stone structure built between 1904 and 1922 by the Belfast Water Commissioners. Walking sections of the wall is one of the great mountain experiences in Ireland.
Slieve Donard dominates the eastern end at 852 metres, the highest peak in Northern Ireland. On clear days from the summit, you see into Snowdonia across the Irish Sea and to the Isle of Man.
The Landscape
The Cooley and Mourne Mountains are granite uplands carved by glaciation. Cooley peaks are rounded and forested; Mourne summits rockier with sharper ridge lines. The Mourne Wall — 35km of grey stone linking peaks — is a masterpiece of mountain engineering.
Carlingford Lough is the transition zone: a sheltered inlet framed by mountains on both sides. Vegetation shifts with elevation; lower slopes are forested with birch, oak and ash; higher moorland features bare granite, alpine grasses, and purple heather blooming in late summer.
Wildlife includes red grouse, red squirrels, peregrines and otters. Sika deer range open moorland at dawn and dusk. Tollymore Forest Park doubled as lands beyond The Wall in Game of Thrones.
Points of Interest
location_on
Carlingford medieval town
Norman port with castle, fortified walls and town gates; centre for oyster farming
location_on
Carlingford Lough Ferry
20-minute scenic crossing from Greenore to Greencastle; the boundary between south and north
location_on
Slieve Foy (589m)
The dominant peak of the Cooley Mountains with views across Carlingford Lough to the Mournes
location_on
Slieve Donard (852m)
Highest peak in Northern Ireland; regular 16km day hike from Newcastle with Irish Sea views to the Isle of Man
location_on
The Mourne Wall
35km drystone wall linking 15 summits; built 1904–1922 by Belfast Water Commissioners; extraordinary mountain engineering
location_on
Silent Valley Reservoir
Scenic mountain lake at the heart of the Mourne range; perfect rest-day walk
location_on
Tollymore Forest Park
630 hectares of ancient woodland with stone bridges and river walks; Game of Thrones filming location
location_on
Rostrevor
Small village on Carlingford Lough; Narnia Trail in nearby Kilbroney Park; connection to C.S. Lewis childhood inspiration
location_on
Newcastle
Seaside resort and main Mournes base; Victorian promenade, beach access, full range of accommodation
location_on
Murlough Nature Reserve
Sand dunes and beach south of Newcastle; excellent sea swimming in summer months
Walking Difficulty
The Cooley and Mournes tour is moderately challenging to challenging. Cooley is easier; rolling foothills with well-established paths. The Mourne side requires mountain experience. Slieve Donard at 852m is higher and steeper, with rocky terrain and exposed ridge walking.
Daily distances run 15–22 kilometres with ascents of 400–700 metres. Weather is demanding; the mountains face the Atlantic with rapid changes. Proper waterproofs, good boots and navigation skills are essential.
Best Time to Visit
Choose your ideal season based on weather, crowds, and daylight hours.
Jancheck
Febcheck
Marcheck
Aprcheck
Maystar
Junstar
Julcheck
Augcheck
Sepstar
Octstar
Novcheck
Deccheck
★ = Best months ✓ = Available
Culture & Heritage
The Cooley and Mournes sit at the intersection of ancient mythology, medieval Norman settlement, literary inspiration and cross-border identity.
Carlingford is the historical anchor: a medieval Norman stronghold. King John's Castle, walls and gate towers remain. Carlingford oysters are celebrated for their rich, clean taste.
The Táin — the great epic cycle of Irish mythology — unfolds across Cooley. Cú Chulainn defended the ford. C.S. Lewis spent childhood summers here creating Narnia; the view from Rostrevor was his explicit Narnia inspiration.
Percy French's 1896 song "The Mountains of Mourne" remains one of Ireland's most famous songs.
Local Food & Drink: Carlingford oysters, Mourne seafood from Kilkeel, Newcastle's seafront restaurants.
Getting Here
Dublin Airport (DUB) is the primary arrival point, approximately 100km north of Dublin. Carlingford is a 90-minute drive or bus journey. Belfast International (BFS) and George Best Belfast City (BHD) serve the Mourne side, within 60km of Newcastle.
The Carlingford Lough Ferry operates seasonally Easter through October; crossing time is 20 minutes. Direct coach services run from Belfast to Newcastle in 45 minutes.
Irish Rail operates services from Dublin to Dundalk and Drogheda; Translink NI Railways operates Belfast services.
Frequently Asked Questions
What is included in a self-guided walking holiday? expand_more
Our self-guided tours include: carefully selected family-run B&B accommodation, comfortable en-suite bedrooms (where available), a full Irish breakfast each morning, complimentary luggage transfers between accommodations, detailed maps and route notes, local advice on places to visit and eat, full pre-departure information, a waterproof map case, and 24/7 local emergency contact support. Extra nights and local transport information can be arranged on request.
What is NOT included in the tour price? expand_more
The tour price does not include flights, travel and baggage insurance, lunches, or evening meals.
Is a GPS app or digital navigation included? expand_more
Yes. Our tours include a digital route guide with GPS navigation, offline maps, and local insights via our mobile app, so you can navigate confidently even without mobile signal.
Is 24/7 emergency support really available? expand_more
Yes. Our team provides 24/7 local emergency contact support throughout your tour. If you encounter any difficulties on the trail or with your accommodation, you can reach us at any time.
Are evening meals included? expand_more
Evening meals are not included in the standard tour price. Your B&B hosts can usually recommend nearby restaurants, and many guesthouses can arrange an evening meal on request.
Are lunches included? expand_more
Lunches are not included. However, you will typically have the opportunity to purchase picnic lunches, and we provide local advice on where to eat along the route.
What is the difference between a self-guided and a guided walking tour? expand_more
On a self-guided tour, you walk independently using our detailed maps, route notes, and GPS app, with your luggage transferred each day and 24/7 support available. A guided tour provides a local expert guide who walks with you, shares local knowledge, stories and history, and ensures you stay on track and safe. Guided tours also include built-in companionship with fellow walkers.
Which type of tour is best for first-time visitors to Ireland? expand_more
For first-time visitors, a guided tour is often recommended, as it provides expert support, helps you learn the trails, and offers the chance to meet other walkers. Experienced hikers frequently prefer the freedom and flexibility of self-guided tours at their own pace.
Showing 8 of 57 FAQs · View all FAQs
Ready to Walk Cooley & Mournes?
Explore our curated walking tours and start planning your next adventure.
Get Started