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entry status unconfirmedCenturion Running
Autumn 100
Centurion Running
Next edition: Saturday, 16 October 2027 – Sunday, 17 October 2027Goring and Streatley, England
A fast 100-mile trail race built from four different 25-mile out-and-back spurs on the Thames Path and Ridgeway, returning to Goring between each leg.
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
AscentUnknown
Climb / kmUnknown
CutoffUnknown
Cutoff paceUnknown
Technicality3/10
EntryNot verified
FormatUnknown
Next edition
16 October 2027 – 17 October 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 Past edition
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 161 km
- Ascent
- 1,500m
- Cutoff
- 28h
- Entry
- £220
- Format
- continuous · single stage · out and back
- Stage layout
- Not applicable
Successful source check: 1 Sept 2026Source confidence: highThe official event and entrants pages verify the 17–18 October schedule, 161K distance, 1,500m ascent, 28-hour cutoff, £220 fee, 250-runner field, sixteen aid stations, four-spur format and sold-out status. No future date is inferred.
Check Autumn 100 2026 source (opens in a new tab)
Race For You difficulty
5.5/ 10
Hard
Limited input evidence · 15% 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 0.00 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 percent5.5 out of 10
Technicality, weighted 15 percent3 out of 10
Accumulated burden, weighted 17 percent5.1 out of 10
Exposure & support, weighted 13 percent5.5 out of 10
Course analysis
What shapes this race
Expect largely runnable, non-technical surfaces.
trailmixednon-technical
Cutoff analysis
Unknown
The official overall cutoff has not yet been verified. Race For You will not estimate one.
Who this suits
First ultra?
Better suited to runners with prior ultra, mountain or technical-terrain experience than to somebody choosing their first ultra.
4.5/10 suitability
Exposure & kit
unknown kit
Night-running exposure has not been verified for this edition. Check the organiser’s latest schedule, route information and final kit rules.
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
Support levelunknown
LogisticsPublic transport possible
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 PartialField-scoped verification 2026-10-20: Official 2027 100 Mile Grand Slam registration explicitly confirms Autumn 100 for 16–17 October 2027. Individual entry status, fee, route, elevation and cutoff are not confirmed by the package, so remain unknown. Approximate kilometre equivalent of the published 100-mile distance; no 2026 details inherited. Only the stated facts are confirmed for this edition.
- Successful source check
- 20 Oct 2026
- Catalogue record updated
- 20 Oct 2026
- Official source
- Available
Still unverified: elevation, cutoff, entry price.
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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