Castles in North Wales : A Guide from Barmouth

North Wales has one of the densest concentrations of medieval castles anywhere in Europe. Barmouth sits at the heart of it — a coastal base within reach of the UNESCO ‘Big Four’ and the native Welsh strongholds that came before them.

Few regions anywhere pack in castles the way North Wales does. Edward I’s conquest of Wales in the late thirteenth century left behind four of the most complete medieval fortresses in Europe — Harlech, Caernarfon, Conwy and Beaumaris, together forming the Castles and Town Walls of King Edward in Gwynedd UNESCO World Heritage Site. Layered underneath that is an older story: the native Welsh strongholds built by the Princes of Gwynedd, smaller, wilder, and largely overlooked by the coach-tour circuit.

This guide covers both — the four great UNESCO castles and the best of the native Welsh sites — with honest drive times from The Belmont Barmouth, Marine Parade, Barmouth LL42 1NA. Barmouth sits almost exactly midway between the two castle traditions, making it one of the best-placed bases in Wales for exploring both properly.

Planning a castle hopping stay

The Belmont sleeps up to 18 across 9 bedrooms – a base for the group to split up and regroup for dinner.

Quick Reference

North Wales Castles at a Glance

Drive times are approximate and will vary with traffic through Dolgellau and the coast road in peak season. Harlech, Castell y Bere, Criccieth and Caernaforn are all comfortably within an hour, Beaumaris and Conwy run a little over but are well worth the extra time.

If you could only visit one

Short on Time? 

Our answer every time:

Visit Harlech.

It combines spectacular scenery, UNESCO status, fascinating history and one of the finest castle settings anywhere in Europe — and it’s ten minutes from the front door. If your stay only allows for one castle, this is the one that delivers on every front: the drama of the setting, the depth of the history, and a view back toward Snowdonia that stays with people long after they’ve gone home.

Staying in Barmouth with a group in Barmouth?

The Belmont Barmouth 9 bedrooms sleeps up to 18 guests . A short drive from Harlech Castle.  

At A Glance

Which Castle Is Best For You?

If you’re planning which to prioritise, here’s how we’d match each castle to what you’re after.

Section 1

The Big Four: North Wales’s UNESCO Castles

In 1986, four castles built by Edward I during his conquest of Wales were together inscribed as a UNESCO World Heritage Site — recognised as among the finest examples of late-thirteenth-century military architecture in Europe. All four were designed by the same master architect, James of St George, and all four are within reach of Barmouth.

Harlech Castle – 20 mins drive 

Unesco world heritage – Built by Edward 1, 1282-1289

The closest of the four, and for most visitors staying in Barmouth, the essential one. Harlech is widely considered the most dramatically sited of Edward I’s Welsh fortresses — built directly onto a rocky crag, with Snowdonia rising behind it and, in the thirteenth century, the sea at its foot. Completed in just seven years under James of St George, its concentric “walls within walls” design made the most of the natural defences, and it withstood a seven-year siege during the Wars of the Roses.

A floating footbridge now lets visitors enter as originally intended, for the first time in 600 years. On-site exhibition, cafe and toilets at the visitor centre; parking is a short, steep walk below the castle.

• Route from Barmouth: A496 coast road
• Pair it with: Harlech beach, immediately below the castle, and the Wales Coast Path, which runs directly through the town

LOCAL TIP: Visit first thing in the morning, ideally before 10:30, to have the castle largely to yourselves before the coach groups arrive from Porthmadog and the north coast.

Caernarfon Castle – Around 1hr from The Belmont

UNESCO World Heritage · Built by Edward I, from 1283

The grandest of the four. Caernarfon was built as the administrative seat of English government in North Wales, deliberately monumental, with polygonal towers and banded stonework echoing the walls of Constantinople — a calculated statement of imperial authority. It’s the traditional site of the investiture of the Prince of Wales, most famously in 1969.

Caernarfon deserves a full day: the castle itself, the walled town with its town walls walk, Segontium Roman Fort nearby, and a good spread of restaurants and pubs including the historic Black Boy Inn.

• Route from Barmouth: A470 via Trawsfynydd and Beddgelert, or A487 via Porthmadog
• Pair it with: the town walls walk and Segontium Roman Fort — or extend the trip with a round at one of the championship links courses nearer Barmouth on the way back

LOCAL TIP: Because it’s a full day out from Barmouth, don’t try to squeeze in a second castle on the same trip. Caernarfon, the walls and lunch fill the day comfortably on their own.

Beaumaris Castle — around 1 hour 15 minutes from Barmouth

UNESCO World Heritage · Built by Edward I, from 1295

The last, and in engineering terms the most sophisticated, of Edward I’s Welsh castles. Built on Anglesey from 1295, Beaumaris is a textbook example of concentric design — walls within walls, a moat, and its own dock. Construction was never finished; funding was repeatedly diverted to Edward’s campaigns in Scotland. What survives is still one of the most complete castle ground-plans in Britain, paired with a genuinely pleasant small town on the Menai Strait.

• Route from Barmouth: A470/A55 via Bangor, crossing to Anglesey
• Pair it with: Beaumaris seafront and the Georgian Gaol museum

LOCAL TIP: Being on Anglesey rather than the mainland keeps it quieter than Conwy or Caernarfon — even in August you’ll usually find the pier and seafront relaxed rather than crowded.

Conwy Castle — around 1 hour 20 minutes from Barmouth

Often ranked the most complete medieval castle in Britain. Conwy has eight towers, an intact curtain wall, and royal apartments that survive better here than anywhere else in Wales. It sits inside a fully walled medieval town — nearly a mile of town walls open to walk for free — alongside Plas Mawr, one of the best-preserved Elizabethan townhouses in Britain.

• Route from Barmouth: A470 via Trawsfynydd, Blaenau Ffestiniog and Betws-y-Coed
• Note: the furthest of the four from Barmouth — best treated as a full day out

LOCAL TIP: Conwy gets extremely busy on sunny weekends and bank holidays, with the town’s limited parking filling early. A weekday visit, or arriving before 10am, makes a real difference.

Section 2

The Native Welsh Castles

Long before Edward I’s fortresses, the Princes of Gwynedd — most notably Llywelyn the Great and his grandson Llywelyn ap Gruffudd, the last sovereign Prince of Wales — built their own castles to defend their territory. These are smaller, older and far quieter than the UNESCO sites, and they tell a different story: not English conquest, but Welsh rule, before it ended.

Castell y Bere — 35 minutes from Barmouth

Native Welsh | Built by Llywelyn The Great | From 1221

The most atmospheric of the group, and the one most visitors miss entirely. Built by Llywelyn the Great from 1221 to guard Gwynedd’s southern frontier, Castell y Bere is strung along a rocky outcrop in the Dysynni Valley at the foot of Cader Idris. No gift shop, no cafe, no crowds — a genuinely evocative ruin in a remote and beautiful setting.

• Route from Barmouth: A493 via Dolgellau and Arthog, then minor roads to Abergynolwyn
• Free entry, unstaffed, no facilities on site
• The route passes through Dolgellau, the start point of the Mawddach Trail — easy to combine both in one day

LOCAL TIP: Wonderfully quiet even in the school holidays — most visitors to the area never make it this far off the main road, so you’ll often have the whole site to yourselves

CHANGE PHOTO FOR CONWAY CASTLE

Criccieth Castle — 44 minutes from Barmouth

Native Welsh | Later Edwardian | Built by Llywelyn The Great

A Welsh castle before it was ever an English one. Built by Llywelyn the Great in the early thirteenth century and extended by his grandson, Criccieth was only later strengthened by Edward I after conquest — a genuine mix of native and Edwardian building visible in the surviving walls and gatehouse. Owain Glyndŵr set it ablaze in 1404; scorch marks are still visible on some stonework today.

The setting is the draw: a headland between two beaches, with sweeping views across Tremadog Bay.
• Route from Barmouth: A496 to Harlech, then A497 south
• Pair it with: Black Rock Sands, a short drive further on

LOCAL TIP: Late afternoon light on the headland, looking back toward the two beaches, is the best time for photographs — well worth timing your visit for golden hour if you can.

Dolwyddelan Castle — around 1 hour 5 minutes from Barmouth

Native Welsh | Built by Llywelyn The Great | C.1210

A single square tower on a rocky outcrop above the Lledr Valley, probably built by Llywelyn the Great around 1210 and traditionally linked to his birthplace. Edward I later garrisoned troops here after conquest. The remains are modest compared to the Big Four — essentially the keep and its foundations — but the setting, dwarfed by the mountain of Moel Siabod, is one of the most atmospheric in Snowdonia.

• Route from Barmouth: A470 via Trawsfynydd and Blaenau Ffestiniog, over the Crimea Pass
• Access involves a short walk from a layby on the A470; no dedicated visitor facilities

LOCAL TIP: Go for the mountain scenery as much as the castle itself — the view of the tower against Moel Siabod is the real draw, and it’s at its best in clear morning light before cloud settles on the peaks.

Plan Your Day

 Our Favourite Castle Day

If you only have one day to give over to castles, this is the route we’d suggest — Harlech and Criccieth together, with time for the beach and a proper lunch in between. Both are well within an hour of Barmouth, so nothing about the day feels rushed.

If you only have one afternoon rather than a full day, choose Harlech on its own rather than trying to rush both — it’s the stronger single visit, and rushing Criccieth in on top tends to shortchange both castles.

Why Base Here

Why Barmouth Is the Right Base for Castle-Hopping

Barmouth’s position on the Cambrian Coast puts it almost exactly midway between the two castle traditions of North Wales: the native Welsh strongholds to the south — Castell y Bere, Criccieth — and the great Edwardian fortresses to the north — Harlech, Caernarfon, Conwy and Beaumaris. Few bases in North Wales offer that same reach in both directions.

Most visitors base themselves on the north coast — Llandudno, Conwy, Caernarfon — which puts the UNESCO Big Four within easy reach but leaves the native Welsh castles, and the wilder southern Snowdonia coastline, as a much longer detour. Barmouth flips that: Harlech is ten minutes away, Castell y Bere and Criccieth are both under 45 minutes, and the northern UNESCO castles remain a comfortable day trip.

PLANNING YOUR VISITS

• Cadw membership gives free entry to all six Cadw sites listed here — worth it for stays of 4+ nights or repeat visits
• Harlech and Criccieth pair well as a relaxed half day, both on the same coast road with a beach at each
• Caernarfon and Conwy each deserve a full day on their own once you add the walled towns
• Castell y Bere and Dolwyddelan have no facilities on site — bring water and wear proper shoes

Section 3

Practical Details for Castle Visits

More From The Belmont

Walking Guide

The Mawddach Trail

A flat, 9.5 mile estuary walk starting 400 metres from The Belmont – perfect pairing with a castle day, and a good source for waterfall detours.

Coastal Walking

Wales Coast Path

Barmouth sits directly on the 870-mile Wales Coast Path- ideal for groups combining coastal walking with castle days.

Golf 

Golf Break Accommodation 

Royal St David’s, Aberdovey  and Porthmadog – Championship links courses within easy reach of The Belmont

Waterfall & Walks

Waterfalls Near Barmouth

Arthog Waterfalls & Gorge and more – shaded trails and cascades a short drive from Barmouth, ideal on a warm day between castle visits.

Looking for more ideas? Browse our complete Experience Barmouth Guide, covering beaches, walking routes, golf, coastal paths and more

Stay Close To Some of North Wales Best Castles

The Belmont Barmouth

Whether you’re planning a family holiday, walking weekend or celebration with friends, The Belmont offers the perfect base for exploring castles, waterfalls, beaches and mountain scenery of Eryri National Park before returning to nine comfortable bedrooms, sea views and space for everyone to relax together.

Before you go

Frequently Asked Questions

common questions about visiting castles in North Wales.

The Belmont Barmouth — Self-Catering Base for castle experiences in North Wales

20 minutes drive from the nearest castle. The Belmont is a 9-bedroom self-catering house on Marine Parade in Barmouth, sleeping up to 18 guests exclusively — no other guests, no shared spaces. The kind of self-catering base where everyone arrives the evening before, walks the trail together the next day, and comes back to a fully equipped kitchen, private dining room, games & cinema room with sea views straight off the estuary.

⭐⭐⭐⭐⭐ Visit Wales 5-Star Rated

9 Bedrooms

Individually styled rooms sleeping up to 18. Four bedrooms offer twin or super-king configuration — ideal for group accommodation groups of any mix.

Beachfront Location

Step outside onto Marine Parade and you’re on the beach. Restaurants, pubs and harbour all within flat walking distance. No cars needed.

Absolutely stunning house right by the beach. Rooms are huge! Comfy beds, spotlessly clean- perfect house for large groups/few families

⭐⭐⭐⭐⭐ Verified Guest – Google Review

Myself and my family had the most amazing stay at The Belmont Barmouth. The house was perfect and had everything we needed. We had a holiday we ll never forget, we made memories we will cherish, and we can’t thank Liz for all her help beforehand to get everything sorted. Would absolutely recommend

⭐⭐⭐⭐⭐ Verified Guest – Google Review

RATED 4.9 / 5 FROM GOOGLE REVIEWS – READ ALL REVIEWS