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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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Set to be one of the greatest Ultra Challenges – basecamp is in Scarborough – famous for its Fair, and a popular seaside spa since the 17th century.
  • Sat 20 - Sun 21 Jun
  • £49-£199
Scarborough, North Yorkshire, UK

North Yorks Ultra Challenge

Set to be one of the greatest Ultra Challenges – basecamp is in Scarborough – famous for its Fair, and a popular seaside spa since the 17th century.

  • Beginner-friendly
  • Event village
  • Age 16 & over
  • 100K ultra run 2
  • 50K ultra run 2
  • Trail run
  • 10 miler
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
  • £175
  • 2 charities
Chichester, West Sussex, UK

Race to the King | 100K Non-Stop

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.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 1510 m ascent
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.

  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Relay
  • Age 18 & over
  • 24 hrs trail running + 3182 ft ascent
  • Sat 6 - Sun 7 Jun
Kendal, Cumbria, UK

Lake District Ultra Challenge

  • Trail run 2
  • 50K ultra run 2
  • 100K ultra run 2
  • Marathon
  • Sat 20 Jun
Hebden Bridge, West Yorkshire, UK

Two Rose Ultra | Two Roses Ultra - 100K

  • 100 km multi terrain running + 5175 ft ascent
  • Sat 20 Jun
Weymouth, Dorset, UK

Jurassic Coast 100K Ultra

  • 100 km trail running + 2900 m ascent
  • Fri 3 - Sat 4 Jul
Epping, Essex, UK

The Full Essex Way Ultra

  • 82 miles trail running + 3469 ft ascent
  • Sat 11 - Sun 12 Jul
Watlington, Oxfordshire, UK

Race to the Stones

  • 50K ultra run 2
  • 100K ultra run 3

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