Beachside Bouldering on Anglesey

Delightful cottage with all mod cons, less than five minutes walk from the beach and a short walk from bouldering in a rocky cove.

OK, the advert for the holiday cottage I rented for my family holiday on Anglesey didn’t read like this. Perhaps the ad should have.   It was great being able to do a little bouldering on the beach and an added selling point for staying in that part of Anglesey.

It was actually a happy coincidence that I happened to be staying close to a small bouldering venue. It was only after I’d booked the cottage that I found out about the bouldering at Lon Isallt Bay when I was researching the bouldering on Anglesey on UKClimbing.

Lon Isallt Bay is a small, pretty and sheltered cove on the Holy Island part of Anglesey between Porth Dafarch and Trearddur Bay. There are a few short sections of crag above a pebble and sand beach. Plus, there’s another small crag on the promontory between Lon Isallt Bay and Porth-y-post.

What I really liked about bouldering there was that the Bay was quiet, the landings were flat and I could just pick a bit of rock to climb about on. It was also relaxing and cool to climb straight off a beach.

On the downside, the crag at the back of the Bay has some loose rock that I had to watch out for. There was also a lot of Sea Ivory lichen on the upper sections of the crag at the back of the Bay and on the crag towards Porth-y-post. At times all these crunchy, brittle tufts made me feel like I was climbing on rock coated in Shredded Wheat and caused me to worry my feet might slip off the rock.

Despite the interesting flora, Lon Isallt Bay was a fun place to climb. I hope to go back, and if next year’s summer holiday takes me to the beach, I will definitely have to see if there is any bouldering nearby.


Lon Isallt Bay is the next cove with a beach southeast of Porth Dafarch and is just outside the town of Trearddur Bay. On my OS 1:25,000 map it’s named Porth y Corwgl.

The road between Porth Dafarch and Trearddur Bay runs close to Lon Isallt Bay, but it’s not that easy to see if you’re passing in a car. What is more obvious is a house called Moryn that sits alone above the Bay.

In a dip in the road near this house is a footpath to the Bay, but this was impassably overgrown when I was there. An easier alternative is to walk over to Lon Isallt Bay from Porth-y-post.

UKClimbing suggests parking at the bend in the road near Moryn, but to me this seems like a tight spot to park. The alternatives seem to be to park on the road at Porth-y-post or to park at Porth Dafarch. The walk from Porth-y-post is less than five minutes while the walk along the coastal path and then the road from Porth Dafarch is about fifteen to twenty minutes.

4 thoughts on “Beachside Bouldering on Anglesey

  • I don’t normally boulder but that does look like the sort of thing I’d happily play around on – although I don’t have a mat so perhaps not so high! 😉 A walk in and back out again will be a good way to relax and cool down the muscles I think,

    • Bouldering is great, but you’re right that a mat is a good idea. Maybe a bit of traversing? All the fun, but half the height.

      A great thing about beachside bouldering is that you can go for a paddle in the sea to cool your hot feet off after climbing.

      Best wishes,


    • Only the black rocks on the southeast of the bay looked tidal. The little crags at the back of the bay and on the land above it weren’t.

      I was tempted to try some DWS there, but the rock above the water at low-ish tide was pretty smooth and I decided not to try it. Maybe I will somewhere where the water is warmer.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.