Holyhead Mountain
coasteering group photo
Photo of a coasteering group traversing a rockface just above the waves
Coasteering - Rhoscolyn

Holyhead Mountain & South Stack Walk

This walk over 500 million year old early cambrian quartzite has some of the best views and most stunning scenery in the UK. You will learn of the early history of the rock, laid down as sand in a warm shallow sea, through the stresses and strains of mountain building and the opening-up of the Atlantic Ocean, to the scouring of the ice ages and on to modern day. With Chough and Peregrine circling our heads, we will be walking in the footsteps of the Celts, Romans and 19th Century Quarrymen, and looking out on a perilous stretch of coast and hearing tales of the sea.


You can easily book our most popular walks by clicking on the ‘book now’ button. You will be directed to a calendar page with our external online booking partner where you can select from available dates.

We offer a number of dates throughout the year for the Holyhead Mountain and South Stack walk, but this walk can also be run on a bespoke basis to meet your needs.

If you need any assistance with making a booking or there are no course dates advertised for the walk you want through our booking system, please get in touch  to check for alternative availability.

Geology at LLanddwyn

Course Details

Where: Meet at the lower car park on South Stack Road

What do you need: good walking shoes or boots, clothes for the weather, sun cream and a drink

Facilities: Toilets and a cafe at the RSPB South Stack visitor centre

Important to know: Our coastal walks generally require a reasonable level of fitness and agility as the coastal path can be steep and uneven in places. This walk is more challenging as it takes us over steep rocky ground to the top of Mynydd y Twr / Holyhead Mountain. Please discuss any concerns with us prior to booking.

Age appropriate: 10+

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One of Anglesey’s best loved, ‘must-do’ walks if you want to learn about Anglesey’s intriguing geological past in a stunning setting with the mountains of Snowdonia and the Lleyn as a backdrop. The Island was once home to Dwynwen the patron saint of Welsh lovers and a small community of fishermen. 

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