Triathlon X - Full X

Date & Location

Ambleside, Cumbria

Organiser’s Description

With a total of almost 17,000ft of ascent over 140 miles of gruelling Lake District mountains, the X is the World's toughest extreme triathlon. Swim around the head of Windermere; tackle the famous Fred Whitton bike ride - Struggle, Honister, Newlands, Whinlatter, Hardknott, Wrynose - at over 12,000ft of ascent this is the hardest bike section of any 'Iron man' event in the World; run a marathon to the top of Scafell Pike, climbing over 5,000ft to England's highest point, and back. It's not just the total ascent, it's the severity of the climbing that distinguishes the X as the World's toughest.


  • 2.4 mile swim
  • 112 mile cycle
  • 26.2 mile run
  • Triathlon
  • Ironman
  • Lake
  • Road
  • Trail
  • Extreme
  • Mountain

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