If you want one walk that sums up why the Clwydian Range deserves far more attention than it gets, then the Moel Arthur Loop is it.
This high-level circuit links two of Wales’ most impressive Iron Age hillforts — Moel Arthur and Penycloddiau — along a ridge that’s been walked, defended, and buried in for well over 2,500 years. Expect big skies, heather moorland, some genuinely steep climbing, and views that stretch to Snowdonia and the Isle of Man on a clear day.
Moel Arthur & Penycloddiau: A Complete Walking Guide to the Clwydian Hills’ Iron Age Summits
Distance: 11.8 km (7.3 miles) | Time: 3h 53m | Ascent/Descent: 470m / 471m | Difficulty: Moderate–Strenuous | Region: Clwydian Range and Dee Valley, North Wales
This guide covers everything you need to actually walk the route safely and enjoyably: where to park, what the terrain is really like, what you’re looking at on each summit, and the practical details that generic route-finders leave out
Moel Arthur Walk Map
Recommended Walking Gear
- 🥾 Waterproof Walking Boots
- 🧦 Merino Walking Socks
- 🎒 Lightweight Daypack
- 🧥 Waterproof Jacket
- 🥤 Insulated Water Bottle
- 🥾 Walking Poles
Table of Contents
Places to stay in Mold
Getting to the Start
The walk begins at the small car park on the minor road that crosses the pass between Moel Arthur and Penycloddiau, roughly midway between the villages of Llangwyfan and Llandyrnog, a few miles north of Ruthin. There’s no public transport serving this spot, so you’ll need your own vehicle. Grid reference SJ146657 will get you there on any OS mapping app or sat nav that accepts coordinates — postcodes in this area are approximate at best, so coordinates are far more reliable.
Arrive early if you can. It’s a small car park, and on a clear weekend it fills up.
Quick Facts
| Questions | Answers |
|---|---|
| Start/Finish | Coed Llangwyfan car park, grid ref SJ146657 |
| Nearest towns | Ruthin and Mold |
| Distance | 11.8 km / 7.3 miles |
| Time | Around 4 hours at a steady pace |
| Ascent | 470m total climbing |
| Stiles | 5 |
| Toilets | None on route |
| Refreshments | None on route — bring everything you need |
| Public transport | None to the start |
| Maps | OS Explorer 265; OS Landranger 116 |
| Best for | Experienced hillwalkers wanting solitude, history, and a proper ridge day out |
Why This Walk Is Worth the Effort
The Clwydian Range runs roughly north to south along the border of Denbighshire and Flintshire, and its summits carry an unusual concentration of Iron Age hillforts — built an estimated 2,500 years ago, most likely by the Deceangli tribe who controlled this part of north-east Wales. This route takes in two of the best: Moel Arthur and Penycloddiau.
Moel Arthur is the smaller of the two forts but occupies a striking, steep-sided summit. Despite the name, there’s no genuine link to King Arthur — historians agree the name predates any Victorian-era attempt to borrow Arthurian legend, and it’s a coincidence of Welsh place-naming rather than a nod to Camelot. One long-standing local tradition ties the hill to Boudica’s burial place, though there’s no evidence to confirm it. Because the fort isn’t in a naturally strategic defensive position, some archaeologists think it may have served a ceremonial rather than military purpose, even though it has all the ramparts and ditches of a proper Iron Age stronghold.
Penycloddiau, the northernmost hillfort in the range, is one of the largest in Wales, covering around 21–26 hectares depending on the survey. It’s officially recognised as a Marilyn (a hill with at least 150m of prominence). What makes it especially interesting is that people were here long before the Iron Age fort was built: excavations have uncovered a Bronze Age burial mound at the summit, along with stone tools dated to roughly 4,000 years old, discovered during work carried out by the Clwydian Range Archaeology Group. In plain terms, the burial mound was already ancient history by the time the hillfort’s ramparts went up.
Both hills sit on the line of the Offa’s Dyke Path, the 285km/177-mile National Trail that runs from Chepstow to Prestatyn — so for a good stretch of this walk, you’re following waymarking used by long-distance trekkers walking the length of Wales.
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This is a high-level, out-and-back-style loop that climbs both summits and returns along a lower contouring track below the ridge you’ve already crossed. It is not waymarked as a single named route, so good navigation and a map are essential — the paths on the ground can be faint in places, particularly on the moorland sections.
From the car park: Go through the kissing gate and start climbing the path that traverses the eastern flank of Moel Arthur. This is a genuinely steep pull — short, but it will get your heart rate up. Minor paths branch off to the summit itself; it’s well worth the short detour to stand inside the ramparts and take in the view back down the valley.
Moel Arthur to Penycloddiau: Continue north along the ridge, joining the Offa’s Dyke Path as it descends to the col below Moel y Parc before climbing again toward Penycloddiau. This section is the heart of the walk — open, exposed, heather-covered ridge with the kind of unbroken views that make the Clwydians special. On a clear day you’ll pick out Moel Famau to the south, the Vale of Clwyd spread out to the west, and on the best days, the mountains of Snowdonia on the horizon.
Crossing Penycloddiau: You’ll cross the outer defensive ditch before reaching the summit plateau, where the scale of the fort becomes obvious — this is a genuinely large enclosure, not a token hilltop earthwork. The reconstructed Bronze Age burial mound sits near the middle.
The return leg: Rather than retracing your steps along the ridge, the route drops onto a lower elevated track that contours below the summits you’ve already crossed, roughly 2km of walking before it rejoins the outward route back to the car park. This section is notably more sheltered than the ridge — useful if the wind has picked up — but can be very muddy, especially after rain. Gaiters are a genuinely good idea here, not just a suggestion.
Terrain and Difficulty
This is a proper hill walk, not a gentle countryside stroll, and it shouldn’t be underestimated because of its modest overall height. Expect:
- Steep, sustained climbs and descents on both summits
- Exposed ridge sections with no shelter from wind or rain
- Faint or eroded paths in places, particularly across open moorland
- Boggy, potentially ankle-deep mud on the lower return track
- Five stiles to negotiate
Suitable footwear is non-negotiable — proper walking boots with ankle support and good grip, not trail trainers. A walking pole is genuinely useful for the steeper pitches.
When to Go
Choose a clear, settled day if you possibly can. The whole appeal of this walk is the visibility — in mist or low cloud, you lose the views that make the ridge worthwhile, and navigation across the open moorland sections becomes noticeably harder. Late July through August rewards you with the heather in full bloom, turning the ridge a deep purple, and you may spot moorland grouse. Whatever the season, the summits are high and offer no shelter, so pack windproof layers even if it looks calm from the car park.
What to Bring
- OS Explorer 265 or Landranger 116 (paper map as backup — don’t rely on phone signal alone)
- Compass and the confidence to use it
- Waterproof boots, gaiters if wet conditions are likely
- Windproof/waterproof jacket regardless of forecast
- Food and water for the full 4 hours — there is nothing en route
- Fully charged phone, but treat it as a backup, not your primary navigation
Nearby Facilities
There are no toilets, cafés, or shops at the car park or anywhere on the route itself. The nearest towns for refreshments, fuel, and facilities are Ruthin and Mold, both a short drive away — worth stocking up before you arrive, and worth planning a stop afterwards as a reward.
A Note on Safety
Both summits are remote, exposed, and unshaded, and the paths are not always obvious on the ground. Tell someone your planned route and expected return time before you set off, and be honest with yourself about turning back if the weather closes in. Hillfort ramparts and ditches can be steep-sided and sometimes hidden by bracken or heather — take care around the earthworks, both for your own footing and to avoid contributing to erosion of features that are thousands of years old.
Recommended Places to stay Nearby
The Bigger Picture
If you enjoy this walk, it’s part of a larger family of hillforts strung along the same ridge — Moel Famau, Foel Fenlli, and Moel y Gaer among them — all built by the same Iron Age communities roughly 2,500 years ago. Each has its own character and makes for a good follow-up trip if this one leaves you wanting more Clwydian ridge walking.
Always carry a physical map and compass in addition to any GPS device, check the weather forecast for the Clwydian Range specifically before setting out, and be prepared to adjust or shorten the route if conditions deteriorate.
Recommended Walking Gear
- 🥾 Waterproof Walking Boots
- 🧦 Merino Walking Socks
- 🎒 Lightweight Daypack
- 🧥 Waterproof Jacket
- 🥤 Insulated Water Bottle
- 🥾 Walking Poles
Frequently Asked Questions
What will I actually see at the hillforts?
At both summits you can walk the surviving ramparts and ditches of Iron Age defensive earthworks, roughly 2,500 years old. Penycloddiau also has a reconstructed Bronze Age burial mound near its centre, predating the hillfort itself by well over a thousand years.
How long does the Moel Arthur and Penycloddiau walk take?
Most walkers complete the full 11.8km circuit in around 3 hours 53 minutes, though this depends on fitness, how long you linger on the summits, and ground conditions. Add extra time if the return track is muddy, as slower, more careful footing is needed.
Is this walk suitable for beginners?
Not really. It’s graded moderate to strenuous, with steep, sustained climbs on both summits, exposed ridge sections, and faint paths across open moorland. It’s better suited to walkers with some hillwalking experience and basic navigation skills.
Where do I park for Moel Arthur and Penycloddiau?
The main car park is at the pass between the two hills, grid reference SJ146657, on the minor road connecting Llangwyfan and Llandyrnog. It’s a small, free car park with no facilities, so arrive early on busy days.
Is the route waymarked?
Partially. You’ll join the Offa’s Dyke Path (marked with acorn waymarkers) for the ridge section between the two summits, but the outward climb and the lower return track are not consistently waymarked, so a map is essential.
Are there toilets or refreshments on the route?
No. There are no toilets, cafés, or shops at the car park or anywhere along the walk. The nearest facilities are in Ruthin or Mold, so plan to stop there before or after your walk.
Do I need to worry about mud?
Yes, particularly on the lower return track, which contours below the ridge and can become very muddy after rain. Gaiters are strongly recommended if the ground has been wet recently.
Can I do this walk with a dog?
Yes, dogs are generally welcome on these open-access hills, but keep them on a lead near livestock and be mindful of ground-nesting birds during spring and early summer. Also check for livestock grazing notices at the car park, as these can change seasonally.
What’s the best time of year to walk it?
Late July and August bring the heather into full bloom across the ridge, adding real colour to the views. However, any clear, settled day works well — visibility is the main factor, since the whole route relies on long-distance views for its appeal.
Is there phone signal on the route?
Signal can be patchy or absent across the ridge and moorland sections. Don’t rely on a phone as your only means of navigation or emergency contact — carry a paper map and let someone know your route and expected return time.
Can I shorten the walk?
Yes. Climbing just one summit — either Moel Arthur or Penycloddiau — and returning the same way cuts the distance significantly and is a reasonable option if time, weather, or fitness is a concern. The full ridge-and-return loop is the more rewarding option if you have the time and conditions allow it.
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