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UK ultra marathons

Every organised ultra in the UK, Northern Ireland and the Crown dependencies. Filter by distance, terrain, hilliness and how you actually get in.

Terrain

Trail Fell Mountain Moorland Coastal path Forest Canal & towpath Road

Hilliness

Flat Rolling Hilly Mountainous

Format

Single stage Stage Timed Backyard

Entry mechanism

First come first served Ballot Qualifying standard Invitational

Field size

Under 50 50 to 149 150 to 399 400 to 999 1,000+

Specific month

January February March April May June July August September October November December

Other

Dates confirmed by organiser Part of a series

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2 events · 5 races

Dragon's Back Race

Conwy Castle · Eryri / Snowdonia

7 Sept 2026 to 12 Sept

380km over 6 days · Choose your own, roughly half of each day · 137km over 2 days · 110km over 2 days16,600mMountainousMountain, Fell150 to 399 runnersFirst come first servedEntry open

Entry details confirmed with the organiser on 15 August 2026.

Run Britannia

Land's End, Cornwall · Cornwall

28 May 2027 to 3 Jul

1,000 miles over 31 stages21,336mRollingTrail, RoadFirst come first servedDate unknown

Entry details as published by the organiser, checked 15 August 2026.