16
100 mile ultra runs in UK
Find 100 mile 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 24 May
- £163-£165
- Sat 24 May
- £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 20 & over
- 100 miles trail running
- Sat 12 - Sun 13 Jul
- £121.99-£251.99
- Sat 12 - Sun 13 Jul
- £121.99-£251.99
Caernarfon, Gwynedd, UK
Black Diamond Yr Wyddfa Snowdon24
Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.
- Chip timing
- Enter online
- Mountainous
- Relay
- Age 18 & over
- 24 hrs trail running
- Fri 19 Sep
- Fri 19 Sep
Hope Valley, Derbyshire, UK
Peak District Challenge | 100 Miles Ultra
By Wilderness Development Trek or Run: 25km, 50km, 75km, 100km or 100miles in 24 hours
- Enter online
- GPS tracking
- Age 21 & over
- 100 miles trail running
- Sat 10 - Sun 11 May
Taunton, Somerset, UK
Westcountry Ultra 100 Miler
- 100 miles trail running + 9538 ft ascent
- Sat 31 May - Sun 1 Jun
Ballycastle, County Antrim, UK
Norn Iron Ultra 100
- 108 miles multi terrain running
- Sat 7 Jun
Castle Douglas, Dumfries and Galloway, UK
Ultra Scotland 100
- 106 miles trail running + 4611 m ascent