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100K ultra runs in August 2026

Find 100k ultra runs near me in August 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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Journey through the beautiful countryside and villages that surround Market Harborough as they traverse the Harborough Round long distance footpath through Northamptonshire and Leicestershire.
  • Sat 15 - Sun 16 Aug
  • £73-£75
Northampton, Northamptonshire

Foxton Hound Ultra 100K

Journey through the beautiful countryside and villages that surround Market Harborough as they traverse the Harborough Round long distance footpath through Northamptonshire and Leicestershire.

  • 100 km trail running + 3842 ft ascent
  • Chip timing
  • Enter online
  • Undulating
  • Age 18 & over
  • Sat 8 Aug
  • £108-£110
Newmarket, Suffolk

Stour Valley Path Ultra Run | 100K

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

The Speyside Way 50K & 100K | 100K

  • 100 km trail running

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