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100K ultra runs in Wales

Find 100k ultra runs in Wales 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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This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.
  • Sat 25 Apr
  • £90.50
Prestatyn, Clwyd, UK

North Wales 100K

This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.

  • 100 km trail running + 8000 ft ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Age 18 & 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, 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.

  • 24 hrs trail running + 3182 ft ascent
  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Relay
  • Age 18 & over
  • Sat 18 - Sun 19 Jul
  • £49-£199
Swansea, West Glamorgan, UK

Gower Peninsula Ultra Challenge

  • 100K ultra run 2
  • Ultra run
  • 50K ultra run 2
  • Marathon
  • Multi-terrain run
  • + 1 more race
  • Mon 7 - Sat 12 Sep
  • £1,699-£2,099
Conwy, Clwyd, UK

Dragon’s Back Race

  • 6 days fell running

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