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Flat 50K ultra runs in London in September 2026

Find flat 50k ultra runs in London 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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  • Sat 12 Sep
  • £139
London, UK

Thames Path Ultra Challenge | 1st Half Challenge 50K

  • 50 km trail running + 200 m ascent

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