Overview
The Mourne Coastal Route stretches roughly 90 km (55 miles) along County Down’s shoreline, linking the sheltered waters of Strangford Lough with the dramatic Atlantic-facing coast near Newry. Following the A2 for most of its length, the route is clearly signposted with white text on brown panels and offers one of Ireland’s most reliable sea-to-mountain drives. It’s a landscape that has inspired generations of visitors, best captured in Percy French’s 1896 song lyric: “Where the Mountains of Mourne sweep down to the sea.”
While the route is famously enjoyed as a self-drive tour, it’s equally well-suited for cyclists and walkers. The corridor passes through historic fishing ports, Victorian seaside resorts, and a string of Blue Flag beaches, with easy access to forest parks, coastal cliffs, and inland mountain loops.
Driving the Route: Three Zones
Tourism Northern Ireland divides the route into three logical zones, making it simple to plan a full-day drive or break the journey into shorter stops.
Zone 1: Belfast to Portaferry Starting from the capital, the route crosses the Ards Peninsula. This section is defined by working harbours, traditional farming landscapes, and quiet coastal villages. Stop at Ballyhalbert, the easternmost point of Ireland, or explore the historic harbour at Ardglass, known for its 14th-century castle and championship golf links.
Zone 2: Portaferry to Newcastle After crossing Strangford Lough by ferry or bridge, the route enters the Lecale peninsula, traditionally known as St Patrick’s Country. Here, the coastline softens into golden dunes and sheltered bays. Key stops include the National Trust’s Castle Ward estate, the distinctive yellow-and-black St John’s Point Lighthouse, and Europe’s largest sand dune system at Murlough National Nature Reserve.
Zone 3: Newcastle to Newry From the active seaside town of Newcastle, the route heads west along the base of the Mournes. The road passes the infamous Bloody Bridge, winds through the historic fishing port of Kilkeel, and ends near Warrenpoint. From here, signposted detours lead into the High Mournes Scenic Loop or the Whitewater Scenic Loop, offering direct access to hiking trails and reservoirs.
Cycling & Walking Options
For those who prefer two wheels or two feet, the coastal corridor is exceptionally well-supported. The Bike Mourne service operates out of Castlewellan Forest Park, offering self-guided e-bike tours that follow the route’s country roads and quiet lanes. The recommended two-day package (from £84.00) includes a fully charged CUBE e-bike, helmet, lock, route map, and a dedicated support line available from 09:00 to 17:00. Luggage shuttles and drop-off points are available for multi-day riders.
Cyclists should note that mountain bikes and standard cycles travel free on all Translink bus services, making it easy to combine public transport with coastal riding. For walkers, the route provides direct access to several standout trails. The Annalong River gorge offers a short, rewarding hike to clear rock pools and waterfalls, while the boardwalks at Murlough provide flat, accessible paths across the dunes. Further inland, the Silent Valley and Spelga Dam loops cater to hikers seeking steeper gradients and panoramic ridge views.
Highlights & Cultural Stops
The route is threaded with landmarks that blend natural beauty with literary and cinematic history. Castle Ward’s 18th-century stables and gardens served as the filming location for Winterfell in Game of Thrones, while the nearby village of Rostrevor and Kilbroney Forest are widely credited as the inspiration for C.S. Lewis’s Narnia series.
History enthusiasts will appreciate the Bloody Bridge near Newcastle, a 17th-century structure that witnessed clashes between Presbyterian settlers and local forces, and the patchwork of coastal fields that once concealed smuggling coves. At Cranfield, a Blue Flag beach overlooks the entrance to Carlingford Lough, where a short 8-minute ferry crosses to Carlingford in County Louth. Keep an eye out for the repurposed WWII airfield runways near Greencastle, now quietly integrated into the surrounding farmland.
Food & Drink Along the Coast
County Down’s coastal towns have a strong maritime food culture, and the route passes several excellent spots to sample local produce. Kilkeel remains Northern Ireland’s largest fishing port; watch the fleet return in the late morning and head to a harbour-side pub for fresh langoustines, mussels, or king prawns. The Made in Mourne craft network operates workshops across several villages, offering demonstrations and retail spaces for local woolens, pottery, and jewellery.
For a proper coastal pub lunch, stop in Dundrum or Newcastle, where traditional inns and contemporary cafes line the promenade. Many restaurants along the route source ingredients directly from local farms and shellfish beds, reflecting a broader regional focus on sustainable, seasonal cooking. Check What’s On in County Down for seasonal food festivals and market days.
Practical Information & Getting There
Getting there
- By car: The route is easily reached from Belfast (45 minutes to Newcastle via the A24) or Dublin (around 2 hours 30 minutes via the M1/A1). Fuel stations and EV charging points are available in Newcastle, Kilkeel, and Warrenpoint.
- By train: The Dublin–Belfast line stops at Newry, providing a convenient rail gateway for the western end of the route.
- By bus: Translink Ulsterbus and Goldline services run regularly between Belfast, Downpatrick, and coastal towns.
Parking & Road Conditions Free on-site parking is available in Newcastle, with designated lay-bys near Annalong, Kilkeel, and Warrenpoint. Most of the route follows single-carriageway roads; allow extra time for steeper climbs near Kilkeel and Spelga, and note that speed limits are posted in mph. Winter visitors should check road conditions before tackling exposed mountain detours, as strong Atlantic winds can affect visibility and driving conditions.
Booking & Contact
- E-bike hires: Book online in advance, particularly for July–August weekends. Support line: +44 (0) 33 0137 4046 (09:00–17:00).
- Ferry services: The Greencastle–Carlingford crossing operates on a seasonal timetable; verify departure times before planning a cross-border stop.
Pack a waterproof layer and comfortable walking shoes, and you’ll be ready to follow the signs from the Ards Peninsula to the foothills of the Mournes at your own pace. The route’s brown signage is reliable, but downloading an offline map ensures you won’t miss the smaller forest park entrances and coastal lay-bys that offer the best photo stops.