UK 100 mile ultras
18 coming up. UK 100 mile ultramarathons — the big one, from national trails to mountain rounds.
December 2026
1 race
January 2027
1 race
May 2027
5 races
1–2 May 2027
Centurion Thames Path 100
Ultra · Richmond, Greater London
100 miles
1–2 May 2027
Ultra X Scotland
Ultra · Dores, Highland
50km · 60km · 110km
8–9 May 2027
Epona 100
Ultra · Abergavenny, Monmouthshire
100km · 100 miles
14–16 May 2027
Ultra-Trail Snowdonia Eryri by UTMB
Ultra · Llanberis, Gwynedd
56km · 78km · 108km
22–23 May 2027
The Grim Reaper Ultra
Ultra · Grimsthorpe, Lincolnshire
10 miles · 40 miles · 70 miles
June 2027
4 races
5–6 Jun 2027
Ultra Scotland 50 & 100
Ultra · Castle Douglas, Dumfries and Galloway
50 miles · 100 miles
12–13 Jun 2027
Centurion South Downs Way 100
Ultra · Winchester, Hampshire
100 miles
19–20 Jun 2027
PHOENIX Minotaur 50 / Hydra 75 / Centaur 100
Ultra · Dorking, Surrey
50 miles · 75 miles · 100 miles
Date TBC · est. Jun 2027
Moray Way 100
Ultra · Forres, Moray
100 miles
July 2027
3 races
August 2027
2 races
September 2027
1 raceOctober 2027
1 race
Nothing matches those filters. Try a wider area or another month.