The Brutal Extreme Triathlons

SEP
19-22
2026
Lake to mountain triathlons in Llanberis with swim laps in Llyn Padarn, 28 mile bike laps and a mountain ascent of Yr Wyddfa.
19-22 Sep 2026

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About the race

The Brutal Extreme Triathlons take place in Llanberis, North Wales, with swim laps in Llyn Padarn and a mountain section on Yr Wyddfa (Snowdon) via the Llanberis Path. The bike course uses a 28 mile lap on open roads and includes climbs such as Pen y Pass plus fast descents. Weather can vary across the route.

Distances and formats available include a choice of solo or relay team entries and the following options:

  • Canol Half: 1.2 mile swim, 56 miles bike, 5 mile lake lap then mountain
  • Mawr Full: 2.4 miles swim, 112 miles bike, 15 miles lake laps then mountain
  • Cawr Double: Ultra laps for double distance solo or team
  • Goron Triple: Ultra laps for triple distance solo or team

Each distance has specific exit and overall cutoffs; overall cutoffs range from eight hours up to sixty four hours depending on the race. Aid stations offer sports nutrition, fruit and snacks at several points on bike and run and at HQ. Before the mountain section athletes undergo a brief medic check. Support crews are required for Double and Triple races and must attend the relevant briefing. Mandatory equipment and safety rules are listed by the organiser and include a waterproof, map, compass, whistle, hi viz vest on the bike, helmet and no drafting. Visit the organization's website for the most recent information.

Brutal Mawr (full Brutal)
Brutal Goron (triple Brutal)
Brutal Cawr (double Brutal)
Brutal Canol (half Brutal)
Brutal Bach (standard)
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