4
100 mile ultra runs in UK
Find 100 mile ultra runs in UK in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sat 23 May 2026
- £163-£165
Buntingford, Hertfordshire, UK
Farmmageddon | 100 Miles
Can you survive Farmmageddon? Held over 32-hours, runners will cover the fantastic 5.3K loop through the lovely grounds of Hyde Hall Farm and receive a t-shirt, buckle and medal to prove it!
- Chip timing
- Enter online
- Undulating
- Traffic free
- Age 21 & over
- 100 miles trail running + 164 ft ascent
- Sat 25 Jul 2026
- £330
Bamburgh, Northumberland, UK
Rat Race 100 Ultramarathon
The 100-mile ultra for people who don't do 100-mile ultramarathons. Walk or run from Bamburgh Castle to Edinburgh Castle within 48 hours, fully supported.
- Recycling
- Newcomers
- Enter online
- GPS tracking
- Hilly
- Park
- Rural
- Coast
- Sustainability policy
- Public transport links
- Age 18 & over
- 100 miles trail running + 4853 ft ascent
- Fri 31 Oct
Hereford, Powys, UK
Black Beacon Mountain Races | 100 Mile
- 100 miles trail running + 7500 m ascent