Porthdinllaen walk, Llŷn Peninsula

Walking trail

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.


Map route for Porthdinllaen marine walk on the Llyn Peninsula


Car park at Morfa Nefyn, grid ref: SH281406


Head to the far end of the car park, from where you'll have great views across the bay towards Pistyll and Trefor. A brick works stood on this site for 40 years; it closed in 1906. Carry on down to the beach. At low tide you can see the remains of the brick works' jetty.

Footpath to the beach at Porthdinllaen, Llŷn Peninsula


Turn left onto the sand and follow the beach for about half a mile (0.8km) until you reach some unfinished sea defences. These were built by the Matthews family, owners of the Cefn Amlwch Estate. The project came to a halt when war was declared in 1914.

View across the beach to Porthdinllaen village, Llŷn Peninsula


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.

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Old ship building from the 1830s and 40s at Porthdinllaen


Carry on around the headland towards the hamlet of Porthdinllaen and the distinctive Ty Coch Inn ('Red House' in English). Porthdinllaen was originally intended to be a major port, with Whitehall (the big building before the Ty Coch) as a hotel. The Ty Coch itself has been a popular inn for almost two centuries.

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

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Seal in Porthdinllaen’s seagrass bed


Carry on past Caban Griff (a small information point) along the footpath leading across the rocks. Check out the rock pools as you go, and keep an eye out for grey seals, which fish along this stretch of coastline.


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

RNLI Lifeboat Station at Porthdinllaen


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.

The view down to Porthdinllaen and across Llŷn Peninsula


Car park at Morfa Nefyn, grid ref: SH281406

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Porthdinllaen walk, Llŷn Peninsula


Steep in places, steps, some uneven parts of the coastal path.

Porthdinllaen walk, Llŷn Peninsula

Contact us

Telephone: 01758 760469

Email: llyn@nationaltrust.org.uk

Porthdinllaen walk, Llŷn Peninsula

How to get here

Morfa Nefyn, Gwynedd
By train

Nearest station Pwllheli, 15.5 miles (25km), see Traveline-Cymru website for details

By road

A497 Pwllheli - Nefyn then B4412 signposted Morfa Nefyn. Follow signs to golf course; car park on the right. Post code for satnavs: LL53 6DA

By bus

Pwllheli to Tudweiliog route goes to Morfa Nefyn, see Traveline-Cymru website for details

By bicycle

NCN Route 41 goes close by, see Sustrans website for details

Porthdinllaen walk, Llŷn Peninsula

Facilities and access

  • None