14/06/2026
Ooh not done this one…we overlook the Preseli so often go there…we so should branch out more- can you go and come back and still us all about it?
Plumstone Mountain: Pembrokeshire’s rocky little giant
Fancy a walk that feels wild, ancient, dramatic and properly Pembrokeshire, without needing to disappear for a full weekend? Put Plumstone Mountain on your list.
Sitting north of Haverfordwest, near Hayscastle Cross and the B4330 towards Croesgoch, Plumstone Mountain is one of those places that can catch you off guard. From the road it may not look like a giant peak, but once you’re up there, with the wind in your face and the views opening out, it feels like you’ve stepped onto the roof of north Pembrokeshire.
The star of the show is Plumstone Rock, a rugged volcanic outcrop rising from open common land. It looks like something dropped there by a giant who was having a very odd day. The rock itself is part of the area’s deep geological story, linked with the same volcanic family of rock seen around Treffgarne and Roch. In plain English: this landscape has attitude, and it has had it for a very long time.
The views are the big reward. On a clear day you can look across towards the Preseli Hills, out over rolling countryside, and across the wider Pembrokeshire landscape. It is a brilliant spot for walkers, wildlife watchers, photographers, dog owners, and anyone who needs a bit of sky therapy. No subscription required.
But Plumstone is not just a nice view and a few impressive rocks. It is also a place with history under your boots.
The mountain and surrounding common include Bronze Age round barrows, ancient burial mounds which remind us that people were living, working, walking and honouring this landscape thousands of years ago. Long before modern roads, phones, car parks and packed lunches wrapped in cling film, this high ground already meant something to the people of Pembrokeshire.
That is the magic of walking places like this. You are not just getting fresh air. You are crossing a landscape shaped by geology, weather, wildlife, farming, common rights, and human stories stretching back into prehistory. Not bad for a “quick walk”, is it?
The area is also important for nature. Plumstone Mountain Common, including nearby Dudwell Mountain, covers a large area of heath and grassland habitat. You may see ponies grazing, birds moving over the open ground, patches of heather, rough grass, boggy stretches and the kind of wild, scruffy beauty that makes west Wales feel like west Wales.
A walk here can be short and simple if you just want to explore around the rock, or you can stretch it into a longer circular route using nearby lanes, paths and tracks. Some routes are steep, wet or uneven, so decent footwear is your friend. Trainers may survive. Your dignity may not.
A few tips before you go:
Wear proper walking boots or strong shoes, especially after rain.
Take a coat, even if the weather looks friendly. Pembrokeshire weather has a sense of humour.
Keep dogs under close control, especially around livestock and ponies.
Take your litter home.
Respect gates, fences, wildlife, and other walkers.
Use an OS map or walking app if you are going beyond the obvious tracks.
Plumstone Mountain is not polished or packaged, and that is exactly the point. It is open, windy, ancient, rocky, beautiful and quietly remarkable. It is the sort of place that reminds you that adventure does not always need a long drive or a grand plan. Sometimes it is sitting just up the road, waiting for someone to say, “Shall we go and have a look?”
So, next dry-ish day, grab your boots, fill a flask, charge your phone, and go explore Plumstone Mountain.
Pembrokeshire has plenty of famous spots. This one deserves a bit more love.
