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Mountainous 100K ultra runs in UK in Summer

Find mountainous 100k ultra runs in UK in Summer - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.
  • Sat 11 - Sun 12 Jul 2026
  • £129.99-£319.99
Caernarfon, Gwynedd, UK

Black Diamond Yr Wyddfa Snowdon24

Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.

  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Relay
  • Age 18 & over
  • 24 hrs trail running + 3182 ft ascent
  • Sat 6 - Sun 7 Jun 2026
Kendal, Cumbria, UK

Lake District Ultra Challenge

  • Trail run 2
  • 50K ultra run 2
  • 100K ultra run 2
  • Marathon

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