Snowdonia Llyn i Llyn

SwimRun UK – Snowdonia Llyn i Llyn

Saturday 5th August 2017 


Llyn Padarn Country Park, Llanberis, Snowdonia National Park, Wales. map

Entry will open on Friday 23rd September at 9pm via

Enter at

Long course – 8km swim & 38km run

2016 Long Course –

Short course –  3km swim & 12km run


This year will virtual repeat this course, but following athlete feedback there will be a few changes to the final swim and run sections in and around Llyn Padarn.

For 2017 we will also be adding a short course. This will start and finish in Llanberis and include a partial ascent of Snowdon followed by the final 25% of the long course.


SwimRun Snowdonia Llyn i Llyn start at Pen y Gwryd, nant Gwynant.


Llyn Padarn. Race HQ

Following the tremendous success of Snowdonia Llyn i Llyn SwimRun UK is delighted to bring Europe’s fastest growing, and most exciting endurance sport to Wales. In particular the area around Llanberis, home of the notorious Slateman and Brutal triathlons and of course Wales highest peak, Snowdon.

Llyn Llydaw and Snowdon / Yr Wyddfa

Based upon Sweden’s ÖTILLÖ island to island race, athletes wearing wetsuits will run between lakes (known in Wales as Llyn) and then, whilst still wearing their trainers, swim across these cold mountain tarns on their way to the top of Wales highest mountain – Snowdon / Yr Wyddfa.

Glaslyn and Snowdon / Yr Wyddfa

The finalised route will be published one month prior to the race, however there will be a minimum of 8 swims and 9 runs with approximately 8km of swimming and 38km of running, including almost 2000m of climbing.

Llyn Tyra

Snowdonia is littered with stunning wild swimming spots. This race will be an ideal opportunity for bored ironman triathletes to visit many of them in the one day.

Male Pairs, Female Pairs & Mixed Pairs.