Saturday 12th June 2021
at 00:00 (UTC +00:00) Europe/London

End: Saturday 12th June 2021
at 00:00 (UTC +00:00) Europe/London

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About the event

Saturday 12th June 2021

You have 6 hours to complete as many laps of our challenging 5.1 km course - 4km trail running and 1.1km swimming in a beautiful part of Snowdonia National Park. Each lap has 200m height gain. 

This could be your first experience of swimrun, or a chance to set the 6hr record, and really hone your swimrun skills for a big race in the future. Fast: 1 lap per 45mins; Steady: 1 lap per 1hr 15m

This swimrun race format is very inclusive: a team who are hoping to qualify for the OtillO World Championships should aim to complete at least 8 laps; or you can just bimble around at walking pace, and have tea & cake between laps. Challenge by choice.


Stunning, marked 4km trail run (200m height gain per lap)

Water safety team on 1100m open water swim across the stunning Tal Y Llyn

​Aid station every 5.1km with water, electrolyte & nutrition

Swimrun race vest

Prizes for most laps in shortest amount of time (male, female, mixed, solo)

Race timing (including laps)​

Event photos

Useful finishers gift

A SWIM SECURE Waterproof Phone Bag


Free parking

Demo wetsuits available to hire by prior arrangement


Beautiful and challenging trail running on a mix of terrain

Swimming across the stunning glacial ribbon lake of Tal Y Llyn

A chance to set the record for most amount of laps in 6 hours

A unique swimrun race in itself, and a chance to get swimrun-ready for what will be a fantastic 2021 season

Hidden waterfalls and fun river crossings, all in the midst of Cadair Idris, "the best mountain in Wales"

Access to Mike's selection of swimrun demo wetsuits, and his wealth of knowledge & experience on all that is swimrun

There will be prizes for the most laps within 6 hours in the shortest amount of time

An adventurous and fun day out - go all out for the record, or just enjoy swimrunning through this beautiful part of the world


Team: £100*

Solo: £60


Tal-y-llyn Lake, Tywyn, UK, LL36