38
100K ultra runs in UK
Find 100k ultra runs near me in UK for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Click an event for full event details, location, route, sustainability, what's included and how to enter.
- Sat 13 - Sun 14 Sep
- £199
- 18 charities
- Sat 13 - Sun 14 Sep
- £199
- 18 charities
London, UK
Thames Path Ultra Challenge | Full 100km Continuous
The full, non-stop option of the epic 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
- Sat 13 - Sun 14 Sep
- £199
- 18 charities
- Sat 13 - Sun 14 Sep
- £199
- 18 charities
London, UK
Thames Path Ultra Challenge | Full 100km over 2 days
An epic challenge from leafy South West London on the River Thames featuring Hampton Court, Runnymede of Magna Carta Fame, Henley-on-Thames and a fabulous celebration finish - all in daylight.
- Chip timing
- Enter online
- GPS tracking
- Flat
- Age 18 & over
- 100 km trail running + 350 m ascent
- Fri 19 Sep
- Fri 19 Sep
Hope Valley, Derbyshire, UK
Peak District Challenge | Gold Ultra 100K
By Wilderness Development Trek or Run: 25km, 50km, 75km, 100km or 100miles in 24 hours
- Enter online
- GPS tracking
- Age 18 & over
- 100 km trail running
- Sat 17 May
Newton Abbot, Devon, UK
Devon Coast to Coast Ultra Marathon | Devon 100K (Mid Devon and Exmoor)
- 100 km trail running
- Sat 9 Aug
Newmarket, Suffolk, UK
Stour Valley Path Ultra Run | 100K
- 100 km trail running + 912 m ascent
- Sat 16 - Sun 17 Aug
Northampton, Northamptonshire, UK
Foxton Hound Ultras | 100K
- 100 km trail running