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Backyard ultras in the UK

One lap every hour until one runner is left. No fixed distance, so the usual filters do not apply: what matters is the lap profile and the field size.

Distance50K50 mile100K100 mile200km+Unbounded
WhereEnglandScotlandWales
WhenNext 3 monthsNext 6 monthsNext 12 monthsSpringSummerAutumnWinter
EntryEntry open nowOpens in 30 daysBallotNo qualifier
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Terrain

TrailFellMountainMoorlandCoastal pathForestCanal & towpathRoad

Hilliness

FlatRollingHillyMountainous

Format

Single stageStageTimedBackyard

Entry mechanism

First come first servedBallotQualifying standardInvitational

Field size

Under 5050 to 149150 to 399400 to 9991,000+

Specific month

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Dates confirmed by organiser Part of a series
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2 events · 2 races

The Longbridge 100 Backyard Ultra (Winter)

Litlington, East Sussex · South Downs
22 Jan 2027 to 24 Jan
4.167 mile laps, last runner standingTrailDate unknown
Entry details as published by the organiser, checked 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.

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Backyard ultras in the UK | Ultralist