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past editionUK Ultra Ltd
UK Ultra South Downs 100 Mile
UK Ultra South Downs
Past edition: Saturday, 3 October 2026 – Sunday, 4 October 2026Plumpton Racecourse, England
UK Ultra South Downs 100 Mile is a looped trail ultramarathon based at Plumpton Racecourse.
Race area · event venue. Approximate race area. Check the organiser’s website for the exact start and race-day directions.
Location evidence
Exact Plumpton Racecourse venue in East Sussex matches current saved start of each product; not other Plumpton towns. Event-to-place relation reuses completed saved catalogue research; this pass verifies geographic match only. GeoNames supplies a representative named-venue location, not a surveyed event start line. GeoNames, CC BY 4.0; https://www.geonames.org/about.html
Location checked 2026-09-14.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance100 mi
Ascent3,658m*
Climb / km22.7m
Cutoff34h
Cutoff pace12:41/km
TechnicalityUnknown
Entry£183
FormatLooped
Latest past edition
3 October 2026 – 4 October 2026
Next edition not yet announced
No confirmed future edition is currently recorded in our sources. The facts below describe the scheduled 2026 edition and are retained for comparison and runner history. An elapsed date does not confirm that the event took place.
Edition archive
This is the only edition currently stored for this race family. Earlier verified editions can be added without changing the permanent race URL.
Check the official race source (opens in a new tab)Race For You difficulty
6.7/ 10
Hard
Moderate input evidence · 74% evidence coverage
The main recorded demands are substantial race distance. Course difficulty and cutoff pressure describe different challenges: more approachable terrain can still require a demanding pace to beat the deadline. Neither score assesses your personal fitness, safety or readiness.
Scoring details and version
Difficulty V2's separate time-limit modifier adds 0.15 points here and is capped at 0.70; a broad limit cannot erase extreme intrinsic demand. This is independent of the public Cutoff Pressure V2 band. Evidence coverage describes the recorded inputs, not prediction accuracy or your likelihood of finishing.
Weather, conditions and individual preparation can change the real difficulty significantly.
How the score works Distance, weighted 30 percent6.8 out of 10
Climbing, weighted 25 percent5.1 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent5.6 out of 10
Exposure & support, weighted 13 percent5.5 out of 10
Course analysis
What shapes this race
The course combines trail, mixed terrain.
trailmixed
Climbing density
22.7m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
Moderate pressure
To finish inside 34h, the raw average required is 12:41 per kilometre (20:24 per mile), including every stop.
Raw pace12:41/km
PressureModerate pressure
Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy. Raw pace includes checkpoints, food stops, navigation errors and any sleep; it is not a pacing plan.
Who this suits
First ultra?
There is not enough verified information to assess first-ultra suitability yet.
Navigation
fully marked
The route is described as marked, but runners should still read the final race instructions.
Exposure & kit
extensive kit
Significant overnight running is likely for many entrants. Lighting, temperature management and sleep strategy can materially affect the outcome.
Personal race predictor
Prediction unavailable
No current compatible predictor target is available for this family. The selected edition may be complete or cancelled, awaiting a successor, non-standard, or missing model-critical course evidence; older facts are not substituted.
Practical detail
Support & logistics
Aid stations12 listed
StartPlumpton Racecourse
FinishPlumpton Racecourse
Support levelfully supported
Logistics are only shown where currently recorded. Confirm parking, transport, crew access and final aid-station plans with the organiser.
Latest verification
Trust the source, see the gaps.
Data PartialThe cited 2026 edition sources were reviewed on 4 September 2026 and support the recorded date, distance, ascent, cutoff state, format and lifecycle. Unresolved facts remain marked unknown rather than being inferred. Field-scoped check 2026-09-28: Specific official banner states entries close 27 September. Deadline elapsed as of 28 September Europe/London. Generic Register Now link does not establish an extension. Only these facts were reviewed; other details retain their previous source dates.
- Successful source check
- 4 Sept 2026
- Catalogue record updated
- 28 Sept 2026
- Official source
- Available
Elevation is approximate or awaiting final confirmation.
Event details can change after a successful source check. Confirm the final route, kit, cutoff, price and entry terms directly with the organiser before entering or travelling.
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