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100K ultra runs in Europe in September 2025

Find 100k ultra runs near me in Europe in September 2025 - search by date or place, 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 from sunny Eastbourne, over the magnificent Seven Sisters, onto Cuckmere Haven and over the South Downs all the way to historic Arundel.
  • Sat 6 - Sun 7 Sep 2025
  • 11 charities
  • Sat 6 - Sun 7 Sep 2025
  • 11 charities
Polegate, East Sussex, UK

South Coast Ultra Challenge | Full 100km continuous charity places

The full distance option of the South Coast Challenge from sunny Eastbourne, over the magnificent Seven Sisters, onto Cuckmere Haven and over the South Downs all the way to historic Arundel.

  • Chip timing
  • Enter online
  • GPS tracking
  • Hilly
  • Age 18 & over
  • 100 km trail running + 2100 m ascent
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 6 - Sun 7 Sep 2025
  • 10 charities
  • Sat 6 - Sun 7 Sep 2025
  • 10 charities
Polegate, East Sussex, UK

South Coast Ultra Challenge | Full 100km over 2 days charity places

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.

  • Chip timing
  • Enter online
  • GPS tracking
  • Hilly
  • Age 18 & over
  • 100 km trail running + 2100 m ascent
The full, non-stop option of the Thames Path Challenge from leafy South West London following the river to Hampton Court, Runnymede to finish at Henley-on-Thames for a celebratory finish and BBQ.
  • Sat 13 - Sun 14 Sep 2025
  • 11 charities
  • Sat 13 - Sun 14 Sep 2025
  • 11 charities
London, UK

Thames Path Challenge | Full 100km continuous charity places

The full, non-stop option of the Thames Path Challenge from leafy South West London following the river to Hampton Court, Runnymede to finish at Henley-on-Thames for a celebratory finish and BBQ.

  • Chip timing
  • Enter online
  • GPS tracking
  • Flat
  • Undulating
  • Age 18 & over
  • 100 km trail running + 350 m ascent
The full distance option of the Thames Path Challenge over 2 days with 50km on day 1 and 50km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.
  • Sat 13 - Sun 14 Sep 2025
  • 11 charities
  • Sat 13 - Sun 14 Sep 2025
  • 11 charities
London, UK

Thames Path Challenge | Full 100km over 2 days charity places

The full distance option of the Thames Path Challenge over 2 days with 50km on day 1 and 50km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 350 m ascent

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