Murlough is beautiful, but it isn't automatically kind to old joints
If you've typed something like dog walks Dundrum, County Down into your phone, the chances are Murlough National Nature Reserve is what's come up, and rightly so — it's one of the most distinctive stretches of coastline in Northern Ireland, a National Trust dune system with the Mournes sitting behind it and Dundrum Bay in front. It's a genuinely lovely place to walk a dog.
It is not, however, a flat park. The reserve is built on old sand dunes, which means a lot of the terrain is soft, uneven, and up-and-down in a way that a young Labrador barely notices and a fourteen-year-old spaniel with dodgy hips notices immediately. This guide is written with that dog in mind — the one who still wants to go, still wants to smell the sea air off Dundrum Bay, but can't manage what he could five years ago.
Where to park at the main gate
The main car park sits off the coast road on the approach into Dundrum, signposted for Murlough National Nature Reserve, and the last stretch in is a narrow single-track lane with passing places — fine most of the time, but it can feel tight if you meet something coming the other way on a busy Saturday. If your dog gets anxious in the car with engines idling close by, a quiet weekday morning is a much easier introduction than a summer bank holiday afternoon.
As a National Trust site, there is usually a car park charge for non-members, so it's worth having a card or your membership to hand rather than relying on cash. The car park itself is where most people start and finish, and it's also the only spot on the whole reserve with anything resembling facilities, so it's worth using the loo and letting your dog have a proper sniff around before you set off, rather than stopping and starting once you're out on the boardwalk.
What the gradient actually feels like underpaw
From the car park, a raised timber boardwalk runs down through the dunes towards the beach. This is the single best feature of Murlough for a senior or arthritic dog — it's firm, reasonably level, and avoids the soft sand entirely for most of its length. If your dog struggles with stairs at home or needs a run-up to jump into the car, the boardwalk is about as forgiving as this landscape gets.
The trouble starts if you wander off it. The wider dune trails that loop up and over the higher ground are genuinely strenuous — steep, sandy, and often broken up by wooden steps that are no fun at all for a dog with sore hips or a slipped disc history. Sand that looks flat from a distance is deceptive too; it shifts and gives with every step, which works muscles a dog doesn't use on pavement or a level park path. A walk that would be nothing on the towpath at home can leave an older dog stiff and reluctant to move the next morning.
The shortest route that still feels like a proper walk
For an older dog, the best plan is usually to walk the boardwalk down towards the beach, let your dog have a paddle or a sniff along the tideline if the weather and the tide allow, and then simply turn back the same way. It's not a loop, and it won't feel adventurous, but it means every step your dog takes on tired legs is one you've already asked of them once, so you know roughly what it's cost them.
If your dog copes well with that and still has energy, you can extend along the flatter fringes near the dune edge rather than pushing up and over the higher dunes. But there's no shame in treating the boardwalk as the whole walk. A ten or fifteen-minute wander down to the sand and back, with plenty of stopping to smell the marram grass, is a completely legitimate dog friendly Dundrum, County Down outing for a dog who used to do the full circuit and simply can't any more.
Are there benches to rest an old dog's legs
Honestly, not many. What seating there is tends to be clustered near the car park and the start of the boardwalk, rather than scattered along the trails themselves, so once you're out among the dunes you're mostly relying on your own legs, or a low bit of ground, if your dog needs a sit-down halfway.
If your dog tires gradually rather than stopping dead, it's worth carrying a folded towel or a lightweight travel mat in the car so you've got somewhere clean and dry to let them lie down at the car park before the drive home, rather than asking a stiff dog to fold themselves straight onto a cold boot floor.
What the ground is like in February, and after rain
Murlough sits right on the coast, so it gets the full benefit of whatever the Irish Sea is doing that day — wind off the water can be sharp even when it's calm a few miles inland at Newtownbreda or Carryduff, and an older dog with thinning fur feels that cold much faster than a younger one. A coat is worth carrying even if your dog doesn't usually need one.
In winter and after heavy rain, low patches between the dunes can hold water and turn to soft, sucking mud rather than firm sand, and the timber boardwalk itself can get slick with frost or algae on a cold morning — worth going slowly with a dog who isn't steady on their feet. It dries out quickly again once the wind picks up, which it usually does, but check the ground with your own boot before committing an arthritic dog to a section that looks doubtful.
Leads, livestock and ground-nesting birds
Murlough is a working nature reserve as well as a dog walking spot, and that means restrictions can apply at certain times of year, either because sheep are grazing the dunes to manage the habitat or because ground-nesting birds are around in spring and summer. These rules change with the season, so rather than relying on what you remember from last year, it's worth checking the signage at the entrance on the day, and keeping an older dog on the lead anyway if you're at all unsure — a sudden bolt after a bird or a sheep is exactly the kind of thing that does real damage to an arthritic dog's joints.
Warming up and settling a stiff dog once you're home
A walk like this, even the short boardwalk version, can leave an older dog quietly sore that evening rather than obviously limping straight away. It's worth getting them somewhere warm and dry fairly soon after the walk, drying off sandy paws properly, and letting them settle rather than expecting them to bounce straight into the next thing.
If you're the sort of owner who's already thinking about dog boarding Belfast or looking after your dog for a day while you're at work, it's worth knowing that a coastal walk like Murlough is a good one to build into a boarding stay too — at Johnny's Doggy Hotel in Newtownbreda, walks are paced to the dog rather than the clock, which matters a lot more once a dog is older and slower than it used to be.