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entries openCenturion Running
South Downs Way 100
Centurion Running
Next edition: Saturday, 12 June 2027 – Sunday, 13 June 2027Winchester to Eastbourne, England
The full South Downs Way from Winchester to Eastbourne: a marked, supported 100-miler on rolling chalk ridgeway with a 30-hour limit and twelve aid stations.
Official race site (opens in a new tab)
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Distance100 mi
Ascent3,800m
Climb / km23.6m
Cutoff30h
Cutoff pace11:11/km
Technicality5.7/10
Entry£225
FormatPoint-to-point
Next edition
12 June 2027 – 13 June 2027
This is the most relevant confirmed edition currently held for the permanent race family. Edition-specific facts should still be checked against the final organiser instructions.
Edition archive
Expand an edition to inspect its year-specific facts. Other years never replace the primary edition facts.
Past editions
2026 to Completed
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 161 km
- Ascent
- 3,800m
- Cutoff
- 30h
- Entry
- £220
- Format
- continuous · single stage · point to point
- Stage layout
- Not applicable
Successful source check: 1 Sept 2026Source confidence: highThe official completed-edition page verifies the 2026 date, 161K route, 3,800m ascent, 30-hour cutoff, £220 fee, 600-runner field and twelve aid stations.
Check South Downs Way 100 2026 source (opens in a new tab)
Race For You difficulty
7/ 10
Very hard
High evidence confidence · 94% evidence coverage
This score is driven most by substantial race distance. Difficulty V2's separate time-limit modifier adds 0.35 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.
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 percent5.2 out of 10
Technicality, weighted 15 percent5.7 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
23.6m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
High pressure
To finish inside 30h, the raw average required is 11:11 per kilometre (18:00 per mile), including every stop.
Raw pace11:11/km
PressureHigh 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?
Better suited to runners with prior ultra, mountain or technical-terrain experience than to somebody choosing their first ultra.
3.8/10 suitability
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
Will you make the cutoff?
Use a previous result to estimate a realistic range for South Downs Way 100, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
Aid stations12 listed
StartWinchester
FinishEastbourne
Support levelfully supported
LogisticsCamping available
LogisticsAccommodation nearby
LogisticsBag drop
LogisticsCrew access
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 HighThe official 2027 page verifies the 12–13 June schedule, 161K distance, 3,800m ascent, 30-hour cutoff, £225 affiliated fee, 600-runner field, twelve aid stations and open-entry status.
- Successful source check
- 1 Sept 2026
- Catalogue record updated
- 1 Sept 2026
- Official source
- Available
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.
Found something wrong?
Help keep this race accurate.
Wrong cutoff? Date changed? New course? Tell us what moved and include the official source if you have it.
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