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100K ultra runs with no navigation required in September 2026

Find 100k ultra runs with no navigation required near me in September 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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The full distance option of the South Coast Challenge over 2 days with 57km on day 1 and 43km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.
  • Sat 5 - Sun 6 Sep
  • £199
Polegate, East Sussex

South Coast Ultra Challenge | Full 2 Day Daylight 100K

The full distance option of the South Coast Challenge over 2 days with 57km on day 1 and 43km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.

  • 100 km trail running + 2100 m ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Hilly
  • Age 18 & over
England’s greatest river provides a fantastic backdrop for an unforgettable 'festival' challenge weekend, with distances from 10km right up to 100km there’s a Thames Challenge for everyone!
  • Fri 11 - Sun 13 Sep
  • £39-£199
London

Thames Path Ultra Challenge

England’s greatest river provides a fantastic backdrop for an unforgettable 'festival' challenge weekend, with distances from 10km right up to 100km there’s a Thames Challenge for everyone!

  • 100K ultra run 2
  • 50K ultra run 2
  • Trail run 4
  • Ultra run
  • 10K run
  • + 4 more races
  • Families
  • Beginner-friendly
  • Entertainment
  • Music
  • Event village
  • Urban
  • Rural
  • Age 14 & over

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