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100K ultra runs in South East

Find 100k ultra runs in South East 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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Great challenges need great settings, and up to 2,000 adventurers will take on the Isle of Wight stunning coastal path – all out to push themselves further this year!
  • Sat 2 - Sun 3 May
  • £39-£199
Ventnor, Isle of Wight, UK

Isle of Wight Ultra Challenge

Great challenges need great settings, and up to 2,000 adventurers will take on the Isle of Wight stunning coastal path – all out to push themselves further this year!

  • Trail run 3
  • 50K ultra run 3
  • 100K ultra run 2
  • Ultra run
  • Families
  • Beginner-friendly
  • Entertainment
  • Music
  • Event village
  • Age 14 & over
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-£185
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.

  • 100 km trail running + 1510 m ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
Travel across the Ridgeway, the UK’s oldest footpath, pass through ancient landscapes, and end at the iconic Avebury Standing Stones. This is a journey on foot through 5,000 years of history.
  • Sat 11 - Sun 12 Jul
  • £90-£275
Watlington, Oxfordshire, UK

Race to the Stones

Travel across the Ridgeway, the UK’s oldest footpath, pass through ancient landscapes, and end at the iconic Avebury Standing Stones. This is a journey on foot through 5,000 years of history.

  • 50K ultra run 2
  • 100K ultra run 3
  • Families
  • Recycling
  • Beginner-friendly
  • Event village
  • Rural
  • Sustainability policy
  • Public transport links
  • Age 18 & over
  • Sat 9 May
  • £118-£120
Chesham, Buckinghamshire, UK

Chiltern Hills 100K

  • 100 km trail running
  • Sat 5 - Sun 6 Sep
  • £89-£199
Polegate, East Sussex, UK

South Coast Ultra Challenge

  • 100K ultra run 2
  • Ultra run 2
  • Trail run

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