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The Big Brutal Swim

Caernarfon, Gwynedd

Llanberis, Caernarfon, UK

Sun 10th September 2023

Starting at 09:00

3 races

£35.00 - £45.00

Organiser's Description

The Big Brutal Swim takes place in the glacially formed Llyn Padarn which is known for being the deepest lake in North Wales. It is also the home of a prehistoric fish called the Artic Char, a species left over from the ice age.

The event is open to wetsuit and non-wetsuit swimmers and the distances available are
2.5 km, 5 km and 10km in both wetsuit and non-wetsuit categories.

T shirt for all entrants.


  • The Big Brutal Swim - 2.5k


  • The Big Brutal Swim - 5k


  • The Big Brutal Swim - 10k




  • The Big Brutal Swim - 2.5k


  • The Big Brutal Swim - 5k


  • The Big Brutal Swim - 10k



Course Details

Pick your distance
2.5k - 2 laps

Swimmers complete 2 laps and exit to the finish.
5k - 4 laps

Swimmers complete 2 laps, exit and re-enter water for a further 2 laps, and then exit to the finish.
10k - 8 laps

Swimmers complete 2 laps, exit and re-enter water for a another 2 laps. This is repeated until 8 laps is completed and then exit to the finish.


What time is registration?
Registration is open from 07:00 till 08:45

Where is registration?
In the main event marquee on the Llanberis Community Field, LL55 4UR

Where / what time is the safety briefing?
This will be held in by the lakeside approx 15 mins before the race start.

What time does the race start?
All races start at 09:00 Sunday 11th September 2022.

Will there be food / drinks on site?
There will be tea and cakes available.

Can I wear gloves for the swim?
Yes, as long as they are not webbed!! You can also wear booties and extra hats.

Do we get out on every lap of the swim?
You get out every second lap of the swim. There will be hot drinks / nutrition available lakeside.

Is there car parking available?
Please read the updated information in the info pack regarding the parking.

Are there showers at HQ?
No, only portaloos

Race cut offs
The cut offs are as follows: 2 hours for the 2.5k, 3 hours for the 5k and 5 hours for the 10k.

There will be trophies awarded to the 1st male / female in all 3 races and both categories (wetsuit and non-wetsuit)

Dinorwac Power Station works

We are aware of the planned works at Dinorwac Power Station over the next few years, but anticipate this will not impact on the race too much. Please be assured we will keep up to date with developments there.

cut offs

2.5k - 2 hours
5k - 3 hours
10k - 5 hours

water temperature

Water temperature in Lake Padarn is likely to be between 17 and 20 degrees depending on rainfall during the days leading up to the event

Event Video


Verified Purchase

A 'verified' purchase review means that we've verified that the person writing the review purchased their entry to this race on


·3 months ago

What a brilliant day and fantastic challenge!! I am a new swimmer and completed the 5K challenge in 2 hours and 1 minute. I chose this event to raise money for the charity MIND. The event was well organised and the staff were really friendly and helpful. A few strokes in I had to give my swim gloves and socks to one of the Kayaking team as the temperature of the lake was so warm I did not need to wear these!! I wish now I had gone for the non wetsuit option! I did my first two laps and I was feeling quite tired but with all the staff and spectators cheering you on it really made you want to keep going!!! The views were amazing while I was swimming! The feeling when I had completed was amazing and I got quite emotional! I will be back to do the 10K next year!! Thanks again to Big Brutal Events for a great day!

·4 months ago

Really stunning location and incredible set up, organisation and event management. Delighted with my time too (which always helps)

Who's In

See who else did this event

Chris Floyd

Rachel Lacey


Caernarfon, Gwynedd

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