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Mountainous 100K ultra runs

Find mountainous 100k ultra runs near me in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Take on England’s finest countryside at your own pace with stunning views all the way, featuring the Garburn Pass, historic Ambleside, a halfway point by Lake Windermere, forests and nature reserves.
  • Sat 6 - Sun 7 Jun
  • £39-£199
Kendal, Cumbria

Lake District Ultra Challenge

Take on England’s finest countryside at your own pace with stunning views all the way, featuring the Garburn Pass, historic Ambleside, a halfway point by Lake Windermere, forests and nature reserves.

  • Trail run 2
  • 50K ultra run 2
  • 100K ultra run 2
  • Marathon
  • Families
  • Beginner-friendly
  • Entertainment
  • Music
  • Enter online
  • Fundraising required
  • Event village
  • Urban
  • Rural
  • Age 14 & over
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
  • £129.99-£319.99
Caernarfon, Gwynedd

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.

  • 24 hrs trail running + 3182 ft ascent
  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Relay
  • Age 18 & over
  • Sat 2 May
  • £99
Brecon, Powys

Rasus y Bannau | 100K Ultra

  • 100 km trail running
  • Sat 15 Aug
  • £80
Aviemore, Highland

The Speyside Way 50K & 100K | 100K

  • 100 km trail running

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