43

100K ultra runs in UK

Find 100k ultra runs in UK in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

Filter by place

Filter by date

Filter by category

Map

Event listings

Select an event for photos, video, route, location, reviews, entry fees and how to enter.

  • Sat 15 Aug
  • £80
Aviemore, Highland, UK

The Speyside Way 50K & 100K | 100K

  • 100 km trail running
  • Sat 15 - Sun 16 Aug
  • £73-£75
Northampton, Northamptonshire, UK

Foxton Hound Ultra 100K

  • 100 km trail running
  • Mon 7 - Sat 12 Sep
  • £1,699-£2,099
Conwy, Clwyd, UK

Dragon’s Back Race

  • 6 days fell running
  • Sat 12 Sep
  • £25-£27
Bradford, West Yorkshire, UK

Leeds Country Way In A Day 100K

  • 100K ultra run 2
  • Sat 3 Oct
  • £95
Wadebridge, Cornwall, UK

Cornwall's Backyard Ultra

  • 4.17 miles multi terrain running

Search options

Back to search options
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.