Overview
The Mourne Coastal Route runs the length of County Down’s shore, from the edge of Belfast down to Newry, and the part worth building a day around is the middle of it: the run where the granite of the Mournes falls almost straight into the Irish Sea between Newcastle and Rostrevor. Percy French had it in one line in 1896 – this is where ‘the Mountains of Mourne sweep down to the sea.’ The signs are white text on brown, the speed limits are in miles per hour, and the drive follows the A2 for most of its length.
End to end, Belfast to Newry runs to about 100 miles (165 km) if you take in the full loop around the Ards Peninsula; the coastal core from Newcastle to Warrenpoint is nearer 50 miles (80 km). You do not have to do all of it. Much of the northern half is ordinary A-road through commuter towns, and the scenery only really earns the name once you clear Newcastle. If you have a single afternoon, drive Newcastle to Rostrevor and back and leave the Ards top end for another day.
Along the route
Tourism Northern Ireland signposts the drive as one continuous route; on the ground it falls into three natural stretches.
The Ards Peninsula (Belfast to Portaferry). A run of working harbours and quiet farming townlands down the eastern spine of the peninsula. Just below Ballyhalbert is Burr Point, the most easterly tip of mainland Ireland. The road ends at the water in Portaferry: there is no bridge across the lough narrows, so you cross on the Strangford car ferry, which takes only a few minutes.
St Patrick’s Country (Strangford to Newcastle). Off the ferry, you are in Lecale. Castle Ward doubled as Winterfell in Game of Thrones – its walled farmyard and tower are the exteriors most fans come for. The coast then softens into golden strands past the black-and-yellow St John’s Point lighthouse, the harbour and 14th-century castle at Ardglass, and the dunes of Murlough National Nature Reserve outside Dundrum.
The Mournes (Newcastle to Newry). This is the stretch that sells the route. From the Victorian resort of Newcastle the road hugs the base of the mountains past the Bloody Bridge, through the fishing port of Kilkeel and on to Warrenpoint and Rostrevor. Signposted detours climb inland to the High Mournes and Whitewater scenic loops, the Silent Valley and Spelga Dam. At Greencastle a small car ferry crosses Carlingford Lough into County Louth on a seasonal timetable – handy for looping back through Carlingford, but check the sailings before you count on it, and remember the Republic switches to kilometres and euros.
Cycling and walking
The corridor is well set up for two wheels or two feet. The Bike Mourne service runs self-guided e-bike tours out of Castlewellan Forest Park, a little inland. Its recommended two-day package (from £84) includes a charged CUBE e-bike, helmet, lock, route map and a support line staffed 09:00 to 17:00, with luggage shuttles for multi-day riders. If you bring your own bike, note that mountain bikes and standard cycles travel free on every Translink bus and Goldline Express coach, which makes a one-way ride easy to plan.
For walkers, the best short reward is the Annalong River: park at Carrick Little and follow the path upstream to a run of clear rock pools that make for a bracing wild swim in summer. The boardwalks at Murlough give flat, buggy-friendly access across the dunes, while the Silent Valley and Spelga loops offer steeper ground and ridge views for anyone wanting to gain height.
Highlights and history
The road carries more than scenery. Rostrevor and Kilbroney Forest are widely credited as the landscape behind C.S. Lewis’s Narnia, and Lewis, a Belfast man, knew these hills well.
The coast has a long smuggling past. The Brandy Pad, a track over the high Mournes, carried brandy, tobacco and silk landed on this shore up into the interior, and the coastal path at the Bloody Bridge was a smugglers’ route too. The bridge’s grim name recalls a massacre rather than any single dated battle. At Cranfield, a Blue Flag beach looks across the mouth of Carlingford Lough, and the flat fields near Greencastle still carry the runways of a repurposed WWII airfield, now quietly folded back into farmland.
Food and drink along the coast
Kilkeel is Northern Ireland’s largest fishing port, and the fleet still lands here. Time a stop for late morning to watch the boats come in, then find a harbour-side pub for langoustines, mussels or king prawns straight off the quay. The Made in Mourne craft network runs workshops and shops across several villages selling local wool, pottery and jewellery. For a sit-down lunch, Dundrum and Newcastle have the best spread of pubs and cafes along the promenade. Check What’s On in County Down for market days and seasonal food festivals.
Practical information and getting there
Getting there
- By car: About 45 minutes from Belfast to Newcastle via the A24, or roughly 2 hours 30 from Dublin via the M1/A1. Fuel and EV charging are available in Newcastle, Kilkeel and Warrenpoint.
- By train: The Dublin–Belfast line stops at Newry, about 10 miles from Rostrevor, giving a rail gateway to the western end.
- By bus: Translink Ulsterbus and Goldline services run regularly between Belfast, Downpatrick and the coastal towns.
Parking and roads Parking is free in Newcastle, with signed lay-bys near Annalong, Kilkeel and Warrenpoint; the Bloody Bridge car park has public toilets, including an accessible toilet. Most of the route is single-carriageway, so allow extra time for the climbs near Kilkeel and Spelga. Speed limits are in mph. In winter, check conditions before tackling the exposed mountain loops, where wind and low cloud can close them in fast.
Booking and contact
- E-bike hire: Book ahead, especially for July and August weekends. Support line +44 (0) 33 0137 4046 (09:00–17:00).
- Ferry: The Greencastle crossing into County Louth runs on a seasonal timetable; confirm departures before planning a cross-border stop.
If you only take one thing from the route, make it the coast road between Newcastle and Rostrevor at low sun, when the light comes off the sea and the granite goes gold – it is the ten miles the song is about.