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Mountain marathons in September 2026

Find mountain marathons near me in September 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Celebrating the unique valleys of the Lake District which are part of the UNESCO World Heritage Site status, by linking them together with spectacular trail and ultra routes for you to enjoy!
  • Fri 25 - Sun 27 Sep 2026
  • £57.50-£185
Keswick, Cumbria, UK

Altra 13 Valleys

Celebrating the unique valleys of the Lake District which are part of the UNESCO World Heritage Site status, by linking them together with spectacular trail and ultra routes for you to enjoy!

  • Newcomers
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Age 17 & over
  • Trail run
  • Ultra run 3

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