100mi events in the United Kingdom
Find 100mi events in the United Kingdom. Compare 15 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Cockbain Track 100, Black Beacon Mountain Races and The Copthorne Races.
Narrow your search to England, Wales and Scotland.
Compare running races by distance, date and surface, from shorter road events to trail races and ultras.
18 listed events · 15 with upcoming dates
Upcoming 100mi events
15 matching events, earliest date first. Entry availability is shown separately.
Cockbain Track 100
ENGSt Ives, Cambridgeshire
A 100-mile track race over the weekend when the clocks go back.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Black Beacon Mountain Races
WALHay-on-Wye / Pontneddfechan, Powys
Four mountain trail distances in the Bannau Brycheiniog area.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
The Copthorne Races
ENGMickleham, Surrey
Looped trail ultras around Box Hill, Mickleham and Headley, with a separate Thursday start for the 200-mile event.
Date listed · latest organiser confirmation not yet checked.
UK Ultra Winter on the Downs
ENGPlumpton, East Sussex
Winter trail races from Plumpton Racecourse.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Centurion Winter Downs 100
ENGAmberley, West Sussex
A 100-mile winter route from Amberley Museum to Juniper Hall.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Chester Ultra 100
ENGChester
Running event in Chester.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Centurion Thames Path 100
ENGLondon, Greater London
Centurion Thames Path 100 — a verified UTMB Index race for the 2026 edition.
Date listed · latest organiser confirmation not yet checked.
Ultra X Scotland
SCOInverness, Highlands
Ultra X Scotland in Inverness.
Date listed · latest organiser confirmation not yet checked.
Centurion South Downs Way 100
ENGWinchester, Hampshire
Centurion South Downs Way 100 in Winchester.
Date listed · latest organiser confirmation not yet checked.
Phoenix Centaur 100 Mile Ultra
ENGDorking, Surrey
Phoenix Centaur 100 Mile Ultra in Dorking.
Date listed · latest organiser confirmation not yet checked.
Moray Way 100 & Relay
SCOForres, Moray
Moray Way 100 & Relay — 100mi at The Moray Way.
Date listed · latest organiser confirmation not yet checked.
Ultra X Wales
WALAbergavenny, Monmouthshire
Ultra X Wales in Abergavenny.
Date listed · latest organiser confirmation not yet checked.
Beacons Way Ultra 100 Mile
WALAbergavenny, Monmouthshire
Beacons Way Ultra 100 Mile in Abergavenny.
Date listed · latest organiser confirmation not yet checked.
Rollin’ 100
ENGClun, Shropshire
Rollin’ 100 in Clun.
Date listed · latest organiser confirmation not yet checked.
Ultra Tour Lancashire
ENGDunsop Bridge, Lancashire
Ultra Tour Lancashire in Dunsop Bridge.
Date listed · latest organiser confirmation not yet checked.
Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
Centurion Autumn 100
ENGOxfordshire, Midlands
Centurion Autumn 100 — Village Hall, Goring-on-Thames, Oxfordshire. Listed on runABC (Midlands).
Next date not listed
Race guide and recorded editions →South Hams Ultra
ENGPlymouth, South of England
South Hams Ultra — Mothecombe Car Park, Plymouth. Listed on runABC (South of England).
Next date not listed
Race guide and recorded editions →UK Ultra South Downs 100 Miles
ENGPlumpton, East Sussex
A 100-mile South Downs trail race from Plumpton Racecourse.
Next date not listed
Race guide and recorded editions →Browse states, counties and areas
Choosing a race in United Kingdom
The unfiltered upcoming calendar includes events in Abergavenny (2), Amberley (1), Chester (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about 100mi events in United Kingdom
What should I check before a running event in United Kingdom?
Choose your distance, then check the route, elevation, cut-off time and entry conditions in the organiser’s race guide.
Which 100mi events are coming up in the United Kingdom?
Cockbain Track 100 is listed for 24 October 2026 (status to be confirmed). Black Beacon Mountain Races is listed for 30 October 2026 (status to be confirmed). The Copthorne Races is listed for 21 November 2026. Check the race guide and organiser’s latest information before making plans.
Where can I find race entry details for the United Kingdom?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.