Slateman Triathlon banner image


Saturday 12th June 2021
at 07:00 (UTC +00:00) Europe/London

End: Sunday 13th June 2021
at 00:00 (UTC +00:00) Europe/London

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Ticket sales for this event close: 11th June 2021
at 23:30 (UTC +00:00) Europe/London


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If the event is cancelled, you can apply for a refund directly from Event Protect provided the cancellation is covered by their insurance policy. Learn more


About the event

The first part of the Adventure Championships, The Slateman Triathlon and Duathlon is the most Iconic Adventure Triathlon and Duathlon in Wales.

Starting in Llanberis; the heart of Snowdonia’s industrial history the Triathlon and Duathlon combine stunning scenery with epic challenges. Swim in the freshwater of Llyn Padarn, run on a combination of trail and road through the historic slate quarries and cycle over the mountain passes; all in the shadow of Wales’ highest peak, Snowdon. The sprint distance bike course is entirely on fully closed roads making it a perfect introduction to cycling Snowdonia’s famous mountain passes. 220 Tri Magazine has listed the Slateman run course as one of the best in the world!

To celebrate our 10th Anniversary, 2021 will be the biggest and best Slateman yet. Warmer water temperatures, additional events over the weekend and a party atmosphere set amongst the incredible scenery Always Aim High Events are famous for making this an event not to be missed from any athletes calendar.

Read reviews here

  • What’s Included
  • Access to the Event Village with food and drink, family activities, entertainment, shopping and toilets
  • The world’s friendliest marshals
  • Full route marking
  • Water and feed stations on course
  • Electronic chip timing
  • Web results service
  • Pick-up wagons
  • Event photography
  • Emergency support
  • Bespoke medal for all finishers
  • Live bilingual commentary 
  • A feast of food at the finish line
  • Goody bag at registration
  • Hoodies that can be purchased at registration and collected on the day
  • Bike Checks available in the Event Village (£5 per bike)
  • Read the race reports from the 2019 Slateman Triathlon here

Please read our race rules 

Enter the incredible Adventure Championships comprising the 2021 Slateman, Snowman and Sandman AND receive one entry half price!


Llanberis, Caernarfon, UK, LL55


Always Aim High Events

Wales, United Kingdom