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100K ultra runs

Find 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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  • Sat 8 Aug
  • £108-£110
Newmarket, Suffolk, UK

Stour Valley Path Ultra Run | 100K

  • 100 km trail running + 912 m ascent
  • Sat 15 Aug
  • £80
Aviemore, Highland, UK

The Speyside Way 50K & 100K | 100K

  • 100 km trail running
  • Sat 15 - Sun 16 Aug
  • £73-£75
Northampton, Northamptonshire, UK

Foxton Hound Ultra 100K

  • 100 km trail running
  • Mon 7 - Sat 12 Sep
  • £1,699-£2,099
Conwy, Clwyd, UK

Dragon’s Back Race

  • 6 days fell running
  • Sat 3 Oct
  • £95
Wadebridge, Cornwall, UK

Cornwall's Backyard Ultra

  • 4.17 miles multi terrain running

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