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100K ultra runs in UK in Spring

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

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This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.
  • Sat 25 Apr
  • £90.50
Prestatyn, Clwyd, UK

North Wales 100K

This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.

  • 100 km trail running + 8000 ft ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Age 18 & over
Great challenges need great settings, and up to 2,000 adventurers will take on the Isle of Wight stunning coastal path – all out to push themselves further this year!
  • Sat 2 - Sun 3 May
  • £39-£199
Ventnor, Isle of Wight, UK

Isle of Wight Ultra Challenge

Great challenges need great settings, and up to 2,000 adventurers will take on the Isle of Wight stunning coastal path – all out to push themselves further this year!

  • Trail run 3
  • 50K ultra run 3
  • 100K ultra run 2
  • Ultra run
  • Families
  • Beginner-friendly
  • Entertainment
  • Music
  • Event village
  • Age 14 & over
Walk, jog or run along the spectacular UNESCO World Heritage coastline from Corfe Castle past Lulworth Cove and Durdle Door, with full support, welcoming base camp and finish line celebration!
  • Sat 16 - Sun 17 May
  • £39-£199
Wareham, Dorset, UK

Jurassic Coast Ultra Challenge

Walk, jog or run along the spectacular UNESCO World Heritage coastline from Corfe Castle past Lulworth Cove and Durdle Door, with full support, welcoming base camp and finish line celebration!

  • Trail run 2
  • 50K ultra run 2
  • 100K ultra run 2
  • Marathon
  • Ultra run
  • + 1 more race
  • Families
  • Beginner-friendly
  • Entertainment
  • Music
  • Event village
  • Rural
  • Coast
  • Age 14 & over
Walk, jog or run the capital-to-coast route with 2,000 other adventurers over a range of distance options available and superb support all the way, for all abilities and experience levels.
  • Sat 23 - Sun 24 May
  • £89-£199
Brighton, East Sussex, UK

London 2 Brighton Ultra Challenge

Walk, jog or run the capital-to-coast route with 2,000 other adventurers over a range of distance options available and superb support all the way, for all abilities and experience levels.

  • Trail run 3
  • Ultra run 2
  • Marathon
  • 100K ultra run 2
  • Families
  • Beginner-friendly
  • Entertainment
  • Event village
  • Age 14 & over
  • Sun 22 Mar
  • £90-£120
Sowerby Bridge, West Yorkshire, UK

Canalathon-Ultra Running Festival | 100K

  • 100 km road running + 377 m ascent
  • Sat 18 Apr
  • £120
Newton Abbot, Devon, UK

Devon Coast to Coast Ultra Marathon | Devon 100K (Mid Devon and Exmoor)

  • 100 km trail running
  • Sat 2 May
  • £99
Brecon, Powys, UK

Rasus y Bannau | 100K Ultra

  • 100 km trail running
  • Sun 3 May
  • £77
Shipston-on-Stour, Warwickshire, UK

Tempo Trail Races | 100K Ultra

  • 100 km trail running + 6682 ft ascent
  • Sat 9 May
  • £118-£120
Chesham, Buckinghamshire, UK

Chiltern Hills 100K

  • 100 km trail running

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