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100K ultra runs in Summer

Find 100k ultra runs near me 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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The full circuit takes in both the Coastal and Castle loops for a magnificent tour of the stunning South Downs. Steeped in history and uniquely varied, the 100K offers a course truly fit for royalty.
  • Sat 20 Jun 2026
  • 4 charities
Chichester, West Sussex, UK

Race to the King | 100K Non-Stop charity places

Secure your charity place in the Race to the King 100K Non-Stop today. Run for charity in a scenic ultramarathon while supporting top UK charities. Find a cause and join their team today!

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 1510 m ascent
Conquer Britain's oldest trail, the ancient Ridgeway, as you race towards the 5000-year-old Avebury Standing Stones.
  • Sat 11 - Sun 12 Jul 2026
  • £85-£255
Watlington, Oxfordshire, UK

Race to the Stones

Conquer Britain's oldest trail, the ancient Ridgeway, as you race towards the 5000-year-old Avebury Standing Stones.

  • Families
  • Recycling
  • Newcomers
  • Event village
  • Rural
  • Sustainability policy
  • Public transport links
  • Age 18 & over
  • 50K ultra run 2
  • 100K ultra run 3
  • Sat 20 Jun 2026
Hebden Bridge, West Yorkshire, UK

Two Rose Ultra | Two Roses Ultra - 100K

  • 100 km multi terrain running + 5175 ft ascent
  • Fri 3 - Sat 4 Jul 2026
Epping, Essex, UK

The Full Essex Way Ultra

  • 82 miles trail running + 3469 ft ascent

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