Skip to content
A beach with a grassy bank to the right of the picture and the sea to the left and cloudy grey skies above
The beach at Porthdinllaen, Gwynedd | © National Trust Images/James Dobson

Porthdinllaen marine trail on the Llŷn Peninsula

This walk will reward you with stunning views in all directions as you follow it along a splinter of land that's an outstanding wildlife haven.

Total steps: 8

Total steps: 8

Start point

Car park at Morfa Nefyn, grid ref: SH281406

Step 1

Head to the far end of the car park, from where you'll have great views across the bay towards Pistyll and Trefor. Carry on down to the beach.

Step 2

Turn left onto the sand and follow the beach for about half a mile (0.8km) until you reach some unfinished sea defences.

View of the coastal village of Porthdinllaen with the sea and waves in the foreground in Gwynedd, Wales
The coastal village of Porthdinllaen, Gwynedd | © National Trust Images

Step 3

Continue along the sand until you reach a spit of land in the shoreline. This site was used for ship building in the 1830s and 40s, when the slate industry in Caernarfon was at its height.

The boathouse above the water with the cliffs in the background at Porthdinllaen, Gwynedd, Wales
The boathouse at Porthdinllaen | © National Trust Images / National Trust

Step 4

Carry on around the headland towards the hamlet of Porthdinllaen and the distinctive Ty Coch Inn ('Red House' in English).

Step 5

As you walk in front of the Ty Coch look along the tide-line for seagrass washed up onto the beach.

Step 6

Carry on past Caban Griff (a small information point) along the footpath leading across the rocks.

Step 7

Go up the steep slope past the lifeboat station onto the golf course. There's a fantastic view across the bay at this point.

Step 8

Follow the track back over the golf course towards the mainland. When you reach the club house, carry on through the golf course car park back towards Morfa Nefyn. Turn left into the National Trust car park where you started the walk.

A view of the beach and surrounding cliffs and countryside from above at Porthdinllaen, Gwynedd, Wales
Porthdinllaen from the skies, Gwynedd | © National Trust Images / National Trust

End point

Car park at Morfa Nefyn, grid ref: SH281406

Trail map

A map of the Porthdinllaen marine trail on the Llŷn Peninsula
A map of the Porthdinllaen marine trail on the Llŷn Peninsula | © Crown copyright and database rights 2013 Ordnance Survey

You made it

Share your experience

More near here

Exposed seaweed covers rocks on Llanbedrog Beach at low tide on the Llyn Peninsula, North Wales

Llanbedrog walking trail 

This walk through the woodland up to Mynydd Tir-y-Cwmwd headland will reward you with spectacular views of the peninsula and Cardigan Bay.

DistanceMiles: 3 (km: 4.8)
Two small rounded islands, Dinas Fawr and Dinas Bach.

Porthor walk 

The views are spectacular along this rugged coastline on the northern side of the Llŷn Peninsula. This is a great walk to absorb some of the history and heritage of the area.

DistanceMiles: 1 (km: 1.6)
View of Nant Gwynant from Dinas Emrys, Beddgelert, North Wales

The legendary trail of Dinas Emrys 

Enjoy a pleasant walk past waterfalls and through beautiful oak woodland to reach this summit of this legendary hill, where Merlin once trod and where a dragon still sleeps.

DistanceMiles: 2.2 (km: 3.52)

Get in touch

Morfa Nefyn, Gwynedd, LL53 6DA

Our partners

Cotswold Outdoor

We’ve partnered with Cotswold Outdoor to help everyone make the most of their time outdoors in the places we care for.

Visit website 

You might also be interested in

Two women walking on a path through woodland on Southwood Estate, Pembrokeshire in Wales

Walking in Wales 

Explore wide open landscapes, gentler coastal strolls or energetic hikes for something a little more challenging. We've rounded up some of the best places to walk in Wales.

A walker standing on the Pembrokeshire coast looking out at the sea.

Coastal walks in Wales 

Discover the best walks along the Welsh coast, taking in picturesque peninsulas, rugged headlands, quaint hamlets, prehistoric monuments and outstanding wildlife.

Seal lying on a shingle beach with head turned to one side, with sea in background

Visit our nature reserves 

The National Trust looks after some of the UK's most important nature reserves, and in doing so cares for a rich and diverse array of wildlife and plantlife. Find out more about these special places and how to visit them.

An aerial view of an adult and baby walking a dog along a path at Baggy Point, Devon

Staying safe at National Trust places 

The special places in National Trust care sometimes come with a few risks for visitors, be it coastline or countryside. Find out how to keep safe throughout your visits.

A group of people in a hiking group are being guided on a hike by rangers at Marsden Moor, West Yorkshire

Cotswold Outdoor: our exclusive walking partner 

Find out more about the National Trust’s ongoing partnership with Cotswold Outdoor as our exclusive walking partner.

A visitor carrying a backpack and walking along a footpath at Divis and the Black Mountain with stone walls either side, the countryside visible in the background.

Follow the Countryside Code 

Help to look after National Trust places by observing a few simple guidelines during your visit and following the Countryside Code.

A group of hikers exploring a hilly landscape on a sunny winters day.


This National Walking Month, explore some of the finest landscapes in our care on coastal paths, accessible trails, woodland walks and everything in between. Find the best places to walk near you.