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50K ultra runs in South East in September 2026

Find 50k ultra runs in South East 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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Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.
  • Sat 12 Sep
  • £60-£62
Wadhurst, East Sussex

Bewl Water Autumn | Ultra

Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.

  • 50 km trail running + 1500 ft ascent
  • Chip timing
  • Enter online
  • Hilly
  • Age 20-80
The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!
  • Sat 12 - Sun 13 Sep
  • £139
Egham, Surrey

Thames Path Ultra Challenge | 2nd Half Challenge 50K

The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!

  • 50 km trail running + 150 m ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Flat
  • Age 16 & over
The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!
  • Sat 26 Sep
  • £139
Henley-on-Thames, Buckinghamshire

Chiltern 50 Ultra Challenge | Full 50km Challenge

The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!

  • 50 km trail running + 920 m ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 16 & over

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