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100K ultra runs in September 2025

Find 100k ultra runs in September 2025 - filter by date or location, display on a map or use the advanced search to find your perfect race.

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A hilly and challenging route showcasing the best of the Peak District for those who can maintain 4kph over 24 hours. Night navigation experience is essential.
  • Fri 19 Sep
  • £80
Hope Valley, Derbyshire, UK

Peak District Challenge | Gold Ultra 100K

A hilly and challenging route showcasing the best of the Peak District for those who can maintain 4kph over 24 hours. Night navigation experience is essential.

  • Enter online
  • GPS tracking
  • Hilly
  • Age 20 & over
  • 100 km trail running + 3300 m ascent
A runnable 100km with a Scottish Highland journey at the heart of the race experience with an exciting midnight mass start.
  • Sat 20 Sep
  • £165
Bridge of Orchy, Argyll and Bute, UK

Skyline Scotland | Jacobite 100

A runnable 100km with a Scottish Highland journey at the heart of the race experience with an exciting midnight mass start.

  • Enter online
  • GPS tracking
  • Mountainous
  • Age 18 & over
  • 100 km trail running + 2400 m ascent
  • Sat 20 Sep
Berwick-upon-Tweed, Northumberland, UK

Pilgrims Ultra | 100K

  • 100 km trail running + 4000 ft ascent
  • Sat 20 - Sun 21 Sep
Hawes, North Yorkshire, UK

Yorkshire 3 Peaks 70/100K Ultra | 100K

  • 100 km trail running + 3169 m ascent

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