The County Down coast is the one I'd send people on if they wanted variety in a single day rather than a single landscape repeated. The Causeway Coast is all volcanic geometry, this run is mountains-to-sea, a tidal narrows you cross on a small ferry, the cleanest beach in the country, a couple of Norman castles, and one of Europe's strongest tidal races. The roads are smaller and the place is quieter. People who do the Causeway weekend and don't come back this way are missing the better half of the country.
Below is the loop I drive when somebody asks. It's not a single signposted road like the Causeway Coastal Route — it's a sequence of small roads round the bottom corner of County Down — but the order works.
The route, briefly
Full loop: 85–95 miles
Newcastle → Murlough → Dundrum → Ardglass → Strangford → ferry → Portaferry → Kearney → Portavogie → Greyabbey → Newtownards. Detour into Downpatrick for the St Patrick sites if that's your thing.
Which way round
Clockwise from Newcastle for the better views of Strangford Lough off your left going down the Ards, and to put the afternoon light behind you on the eastern coast. Counter-clockwise is fine too — the road's the road.
How long
Drive only: 3–4 hours for the full loop with brief stops.
One full day: 8–10 hours with walks, lunches, the ferry, a castle.
Properly: 2–3 days. The peninsula is quietly the part that rewards staying.
Newcastle
Newcastle sits at the foot of Slieve Donard, which is the highest peak in the Mournes and the country (850m). The town is Victorian seaside resort with the mountains behind it, the beach runs south from the Shimna River and continues round Dundrum Bay into the Murlough dunes — roughly three miles of unbroken sand if you keep walking. It's the obvious base if you want both coast and mountain in one day.
The short list
- Beach promenade — flat walk with the Mournes behind you. Decent in any weather.
- Donard Park — start of the Slieve Donard route. Three to four hours up and back if the weather behaves.
- Tropicana — the indoor pool and lido. Saves a wet afternoon with kids.
- Maud's Ice Cream — mandatory after a Slieve Donard walk. The Pooh Bear flavour is the locals' answer.
For the mountains themselves, see the dedicated Mournes hiking guide.
Murlough Nature Reserve
Five minutes south. National Trust dune system, six thousand years old give or take, six kilometres of sand backed by the dunes and the mountains behind. The cleanest beach I know in Northern Ireland and almost always quiet — even at weekends in summer, walk ten minutes from the car park and you've it largely to yourself.
The trails
- Beach — park, walk in either direction, turn around when you've had enough.
- Dune Trail (2km, 45 min) — short waymarked loop through the dune system.
- Woodland Trail (3km, 1 hour) — through old hazel and oak. The birdwatching is the reason to do this one.
Look for common lizards on the sunny paths in summer (they're the only native reptile in Ireland). Marsh orchids in early summer. Heather flush across the heath in late August. Irish hares in the dunes if you're lucky.
Dundrum
Small village at the head of Dundrum Bay, with a Norman castle on a rocky hill above it. Anglo-Norman knight John de Courcy built the original in the 12th century, the circular keep is well-preserved and you can climb the spiral stairs to the top. The siting is obvious as soon as you're up there — clear sight lines in all directions, naturally defensible. Small entry fee, run by the Northern Ireland Environment Agency.
The village itself is a proper village, not a heritage attraction. The Buck's Head Inn does good pub food, The Carriage House does coffee and the kind of traybake your mother thinks you should be having less of. Worth a stop.
Strangford Lough
Strangford is the largest sea lough in the UK and Ireland, 150 square kilometres of tidal water with a narrow neck at the south end. The tides through the narrows run to 8 knots at full flood, which is properly fast — those nutrients running in and out are why the lough is the marine reserve it is. Seals, porpoises (occasionally), tens of thousands of overwintering brent geese from Arctic Canada from October on, horse mussel beds on the floor that are nationally important even if you'd never see them.
The narrows and the tidal race
Stand on either shore — Strangford village or Portaferry — to watch the race. It's worth ten minutes. Kayakers and experienced sailors run it, visitors should watch. The water rips through here at half-tide and goes properly turbulent. Mesmerising, dangerous, free.
Wildlife
- Seals: common and grey both haul out on the rocks around the lough. Best at low tide from Ballyquintin Point, the Mount Stewart shoreline, and the Portaferry marina end.
- Birds: the lough is internationally important for wintering wildfowl and waders. Brent geese from Canada peak around 30,000 birds October through February. Wigeon, teal and waders in the thousands.
- Porpoises: occasionally through the narrows. You'll need patience, decent binoculars, and luck.
Exploris Aquarium, Portaferry
Touch pools, native species, and a seal rescue facility that rehabilitates injured pups before release. Adults £10 ish. It's the best wet-day option on the lough side and works well with children.
Boat trips
A few operators run wildlife trips out of Portaferry and Strangford village from Easter through September. An hour gets you on the water, two and you'll see one of the small wooded islands. Watch the wind direction — a strong easterly makes the narrows uncomfortable.
The Strangford–Portaferry ferry
Eight minutes across the narrows instead of fifty miles round the head of the lough. Half-hourly through the day, year-round. About £6–8 for a car, small fee on foot. Cards or cash. You'll occasionally wait one ferry cycle in summer, rarely longer.
The Ards Peninsula
The Ards stretches thirty miles down the eastern shore of the lough and along the Irish Sea. It's the quietest part of County Down and arguably the best — small fishing harbours, the Cistercian abbey at Greyabbey, the time-stopped village of Kearney, and beaches that empty out as soon as you walk fifteen minutes from a car park.
Kearney and Knockinelder
Near the southern tip. Tiny National Trust hamlet of whitewashed cottages on the coast looking back across to the Mournes. Walk west from the village along the coast and you'll get to Knockinelder beach in about twenty minutes, carry on round Ballyquintin Point and you'll likely see seals on the rocks at low tide. The path isn't always waymarked and the ground gets uneven near the point — wear something on your feet that grips.
Portavogie
Northern Ireland's second-biggest fishing port and a properly working harbour. The fleet lands prawns (Dublin Bay prawns, which is the same as langoustines) and white fish. If you're self-catering, the small shops near the harbour wall sell direct off the boats. Early morning is the time to see the catch landed. None of it is dressed up for visitors, which is the appeal.
Greyabbey
The village around the ruins of a Cistercian abbey founded in 1193. The abbey church is the best-preserved of its kind in either part of Ireland — intact lancet windows, the cloister outline still legible. The village has good cafés, antique shops, and Greyabbey House gardens (seasonal). The right stop for a coffee and a wander mid-afternoon.
Mount Stewart
National Trust property on the lough's eastern shore. Big house, gardens, lake walk that gets you down to the water. The gardens are the real bit — laid out by Edith, Lady Londonderry in the 1920s using the mild lough microclimate to grow Mediterranean plants that have no business surviving this far north. Allow 2–3 hours. The lakeside path connects to seal-watching spots on the shore. Café is good, the bakery does a Battenberg I've not learned to walk past.
The St Patrick sites: Downpatrick and Saul
County Down has the strongest claim of anywhere to the historical St Patrick. Tradition says he landed near Saul in 432 AD, converted the local chieftain, set up his first church, and was eventually buried in Downpatrick. Tradition is doing some work in that sentence, the actual history is messier and Aoife would tell you more about it than I would.
Downpatrick
Down Cathedral sits on the hilltop site of older monasteries. A boulder in the graveyard marks the traditional grave of Patrick (also Brigid and Columba, in the same spot, which gives you a sense of the tradition). The current cathedral is mostly an early-1800s rebuild on medieval foundations.
The Saint Patrick Centre in town has interactive exhibits that do the unglamorous job of separating what we know from what we say at parades. The best place to understand the man rather than the legend. Small entry fee.
Saul and Slieve Patrick
Saul is the tiny village outside Downpatrick where Patrick is meant to have first preached. The current Church of Ireland church and the small round tower beside it are 19th-century memorials, not the original site.
Behind the church, a path climbs Slieve Patrick (a small hill, not a mountain) to an enormous granite statue of Patrick on the summit. The walk up is about 45 minutes and the gradient is gentle. The view from the top — Strangford Lough, the Mournes, the coast — is the reason to do it more than any religious reason. Bring a fleece, the wind picks up on the summit and the statue offers no shelter.
Walks on the coast
Beyond Murlough and the Mournes, four routes worth knowing:
The Lecale Way (in sections)
A 79km / 49-mile waymarked trail from Downpatrick down the Lecale coast — through Strangford, Ballyhornan, Ardglass, Killough and Dundrum — and on to Newcastle. You don't need to do the whole thing, any one section is good walking. The Ardglass-to-Killough stretch and the loop around St John's Point (the lighthouse) are the two I'd pick.
Ards Peninsula coastal paths
The unofficial paths around Kearney and Ballyquintin are the most rewarding walking on the lough. Not always waymarked. Take an OS map (Sheet 21), wear something with grip, and don't rely on phone signal — there isn't much.
Scrabo Tower
Just outside Newtownards. The tower sits on a volcanic plug, the country park around it has waymarked trails through woodland and heath. The tower itself is free to climb when it's open (check the times). Short walks, big views — Strangford Lough one way, the Belfast hills the other.
The beaches
The best beach in Northern Ireland is on this coast, and it isn't the famous one.
Murlough
Covered above. The cleanest, longest beach on the County Down coast. Mountains for a backdrop. Swimmable on calm days but no lifeguards.
Tyrella
Between Newcastle and Dundrum. Two miles of fine sand backed by dunes, with the Mournes behind. Locals' beach, basic facilities, dog-friendly. Currents make swimming chancy — fine for paddling and walking, check before getting in.
Ballyholme, Bangor
If you're coming down from Belfast or North Down, Ballyholme is the family beach — promenade, cafés, lifeguarded in summer, generally safe swim. More developed than the south-coast beaches but the right choice with small kids.
Minerstown stretch
The smaller coves south of Newcastle, off small roads. Quiet. No facilities, so bring what you need.
Eating
Most of the coast lands fish daily and the pubs and restaurants take advantage. Ask for the specials — they reflect what came off the boat that morning.
Newcastle
- Vanilla — restaurant and bakery, the breakfast and lunch are the bit I'd send people for.
- Maggie May's — fish and chips, classic.
- The Anchor Bar — pub food done right.
Strangford
- The Cuan — the proper seafood room on this stretch. Worth the booking ahead.
- The Lobster Pot — harbour views, easier pricing, the fish and chips.
Portaferry
- The Portaferry Hotel — over the narrows, the local seafood does the work.
- Fiddler's Green — pub, music, food.
Ardglass
- Curran's Bar — traditional harbour pub, the seafood is fresh because the boats are out the front.
- Aldo's Ristorante — fine dining in a converted church.
Greyabbey and Kircubbin
- The Wildflower (Greyabbey) — café, the baking is the point.
- Paul Arthurs (Kircubbin) — Michelin-recommended, tasting menus, book ahead.
Photography
Sunrise
- Murlough Beach — east-facing, the mountains catch a sidelight.
- Portaferry harbour — first light across the narrows.
- Scrabo Tower — elevated, the lough lights up below you.
Sunset
- Newcastle promenade — sun goes behind the Mournes.
- Strangford village — evening light across to Portaferry.
- Kearney — across the water to the Mournes again.
The classics
- Dundrum Castle from the bay road below.
- The Portaferry ferry mid-crossing, both villages in shot.
- Kearney's whitewashed cottages from the path west of the village.
- The Greyabbey gothic arches at any hour.
- Slieve Patrick statue with the lough behind it.
One bit of practical advice: tide times matter more than light times on this coast. Low tide opens up foreground rocks and pools, high tide brings water close to features. Check before you set off.
Practical bits
When to come
Summer (June–August): warmest, longest, the weekends busy at the obvious places. Best for beach and water.
Autumn (September–November): the light gets good and the brent geese start arriving from Canada. Quieter. My pick for the lough.
Winter (December–February): short days. The storms make the photographs, the geese are at peak. Some venues run reduced hours.
Spring (March–May): seal pups in February–March on the rocks, days lengthening, the wildflowers from late April.
Driving
A mix of A-roads and small lanes round the peninsula. Expect:
- Narrow single-lane sections on the southern Ards. Take the bends slowly.
- Tractors, slow farm traffic.
- Small car parks at the smaller beaches.
- Sheep on the upland roads.
Fuel in Newcastle, Downpatrick, Newtownards and the bigger villages. Top up before you commit to the peninsula loop.
Cycling
The peninsula is excellent cycling for anyone who can do a long day. Traffic is light off the A roads, the terrain is mostly gentle (with one or two short hills around Downpatrick), and the scenery doesn't quit. Two days does the loop properly, one is rushed. Several operators run self-guided packages with luggage transfer.
Where to stay
Newcastle — best for mountain access and a livelier evening. Most accommodation, all budgets.
Strangford or Portaferry — the quietest version of the coast, best for the lough side. Limited options, book ahead.
Downpatrick — central, more budget-friendly, easy reach to both the lough and the coast.
Portavogie or Greyabbey — small but authentic. Self-catering cottages more than hotels.
The County Down accommodation guide has the detail.
One closing line
The County Down coast is where I take people who already did the Causeway run last weekend and want to know what else there is. They almost always come back the next time too.