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The Pen Llyn Trail & Coastal Series

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Tickets £12–£35, Charity places available

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  • Official booking partner
  • Best price guarantee
  • Free injury protection

Have a question? See our Help Center

Answer the call of the outdoors in this festival of trail running exploring the Pen Llyn Coastal paths. A series for all abilities, participants can choose between 10K, Half, or Full Marathon courses that are packed with mixed coastal terrain and feature thigh burning climes and breathtaking views.

How to enter the The Pen Llyn Trail & Coastal Series

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  1. 10km

    Run 10km
    Standard Entries
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    Charity Entries
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  2. Half Marathon

    Run 13.1mi
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  3. Marathon

    Run 42.2km
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The Pen Llyn Trail & Coastal Series routes

This is a fast, runnable, mainly there and back course, which utilises the All Wales Coastal Path from Pwllheli to Carreg y Defaid.

The Race course starts by Pwllheli Golf Club, where runners will run along the Costal Path route in a westerly direction towards Llanbedrog. After approx 2.0 km, you leave the trackway and onto a grassy path, through a small metal gate. Proceed along the path for approx. 0.5km where you cross a minor road (feed station) and back onto the grassy path. The Path follows the headland of Carreg y Defaid at a gentle climb before a short descent to a timber kissing gate. Proceed along the path through the fields where you will be met by further kissing gates.

At the end of the field section, you descend a set of steps and onto Llanbedrog beach then a short beach section where you will be met by the turnaround point at the 5km point.

The route then heads back along the beach in the opposite direction, passing the steps and continues along the beach. A Marshal will direct you off the beach section via a short steep climb and back onto the coastal path route towards Pwllheli. At the sand dunes near the property know as Y Big, you will veer off the main track and run along a seaward path on the right, which leads onto Cruggan beach. Then it’s a 2km or so beach run towards the finish area at Pwllheli beach. Toes may get wet during high tide.

Half Marathon
Same as the 10k route, but proceed beyond the 10k turnaround point and continue to the end of the beach and towards the bottom of the steep steps near the Old Boat house.

Climb the steep set of steps, which ascends through the wooded north side of Mynnydd Tir y Cwmwd. At the top of the climb take a small path to your right which will leads you onto open ground towards the summit of Mynnydd Tir y Cwmwd.

From the summit take the south/westerly path and decent towards Mount Pleasant, take a left turn at the path junction and follow till you come across the main Costal Path Route, which veers down to your right and down a steep rocky section and onto the minor road below.take a left turn at the road which leads you down to the beach, known locally as Quarry or Warren beach (feed station).

Proceed along the beach in a westerly direction towards Abersoch. The turnaround point will be at the far end of the beach near Y Fach where you will return along the same route in the opposite direction.

Same as the Half and 10k route, but proceed beyond the Half Marathon turnaround point up through the path onto the main A499 road and follow the footway into Abersoch (if tidal conditions are favourable the route may be diverted along the beach and access the road at Land and Sea).

Cross the road at the village centre and onto Lon Traeth which leads you onto the main beach. Proceed along the beach towards a car park at the far end at Machroes. Take a right turn and a short uphill section along a minor road before taking a left turn. The minor road leads you onto a gravely road where after a short climb you take the path to your left through a kissing gate. The path leads you along the Porth Tocyn headland and towards Porth Ceiriad.

Follow the path onwards around the Cilan headland and drop down onto Porth Neigwl, follow the path just above the beach where a right turn will take you to the main beach Car Park (feed station). Take a right when exiting the carpark and follow the minor road which leads to the village of Llanengan. Take a right at the crossroads and follow the minor road to Sarn Bach.

Go straight ahead across the crossroads and follow the road till you come to a T-junction. Take a left at the junction and take the trackway immediately to you left which leads you back onto the trackway towards the Abersoch Golf Club and onto Abersoch beach. Follow the same route back towards the finish in Pwllheli.

Event Details

What’s Included
  • Finisher's Medal
  • First Aid
  • Marshalled Course
  • Water Stations
  • Chip Timing
Raceday Logistics

Event Timeline

08:00: Marathon start
09:00: Half Marathon start
10:00: 10k Start
13:30: Marathon cut off
14:00: Prize Giving – Pwllheli Golf Club

Let's Do This recommends that you arrive at least 45 minutes before your start time.

Feed Stations:

Marathon: Drinks will be available at Carreg y Defaid, Quarry beach car park and Porth Neigwl Car Park

Half Marathon: Drinks will be available at Carreg y Defaid, Quarry beach car park

10km: Drinks will be available at Carreg y Defaid

Kit List

It is recommended that all competitors carry their own water and snacks with them on the route in addition to what is provided at the feed stations.
Additionally, for all three distances, competitors are advised to carry the following kit, especially in inclement weather conditions:

  • Full waterproof body cover (top and trousers)
  • Hat and gloves
  • Water
  • High energy snacks
  • Fully charged mobile telephone

Spectators are more than welcome to join in the festivities and cheer runners across the finish line.


If you wish to volunteer for this event, please send an email to [email protected]

Frequently Asked Questions

Is there a cut-off time for the Pen Llyn Coastal Series?
Yes, there will be a strict cut off time at 13:30 for the marathon event.
Will there be toilets at the Pen Llyn Coastal Series?
Yes, there will be facilities available at Event HQ at Pwllheli Golf Club.
Is the Pen Llyn Coastal Series chip-timed?
Yes, there will be professional chip timing and results will be available immediately after the race on the event website.
Have a question? Get answers from our team.

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The Pen Llyn Trail & Coastal Series weather forecast

Predicted highs
Predicted lows
IconModerate breeze possible, up to 13mph

Meet the organizer

Pen Llyn Ultras

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Pen Llyn Ultras
Tucked away beyond Snowdonia’s craggiest peaks with the Irish Sea on one side and Cardigan Bay on the other, the Llŷn Peninsula has a distinctive, unspoiled character that’s all its own. Its sunny southern coast draws walkers, wakeboarders, and dinghy-sailors There are several islands dotted around the peninsula, with the famous ancient pilgrimage site of Bardsey Island, at its tip and can be seen in all its beauty during the race. The islands and coastline of Llŷn are a haven for wildlife and an area of outstanding natural beauty. Seals and dolphins are common sites around the peninsula. All of this makes a perfect backdrop for the Pen Llŷn Ultra.

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