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entries openCenturion Running
Chiltern Wonderland 50
Centurion Running
Next edition: Saturday, 18 September 2027Goring-on-Thames, England
A 50-mile loop from Goring-on-Thames through the Chiltern Hills, linking historic villages and sections of the Ridgeway on a marked, supported course.
Official race site (opens in a new tab)
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Distance50.3 mi
Ascent1,700m
Climb / km21m
Cutoff13h
Cutoff pace9:38/km
Technicality5.5/10
EntryFrom £118
FormatLooped
Next edition
18 September 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
2026Past edition
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 81 km
- Ascent
- 1,700m
- Cutoff
- 13h
- Entry
- £115
- Format
- continuous · single stage · looped
- Stage layout
- Not applicable
Successful source check: 4 Sept 2026Source confidence: highThe official event and entrants pages verify the 19 September date, 81K distance, 1,700m ascent, 13-hour cutoff, £115 fee, 250-runner field, five aid stations, marked single loop and sold-out status. No 2027 edition is stored without a standalone future schedule.
Check Chiltern Wonderland 50 2026 source (opens in a new tab)
Race For You difficulty
4.5/ 10
Moderate
High input evidence · 82% evidence coverage
The main recorded demands are balanced overall demands. 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 0.55 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 percent4.1 out of 10
Climbing, weighted 25 percent3.7 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent2.7 out of 10
Exposure & support, weighted 13 percent3.9 out of 10
Course analysis
What shapes this race
Expect forest trail that may change character in wet conditions.
trailforestmixed
Climbing density
21m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
Very high pressure
To finish inside 13h, the raw average required is 9:38 per kilometre (15:31 per mile), including every stop.
Raw pace9:38/km
PressureVery high 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?
A realistic target for a prepared runner with some trail or ultra experience, but not the softest possible introduction to the distance.
6.5/10 suitability
Navigation
fully marked
The route is described as marked, but runners should still read the final race instructions.
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
Will you make the cutoff?
Use a previous result to estimate a realistic range for Chiltern Wonderland 50, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
Aid stations5 listed
StartGoring Village Hall, Goring-on-Thames
FinishGoring Village Hall, Goring-on-Thames
Support levelfully supported
LogisticsPublic transport possible
LogisticsAccommodation nearby
LogisticsBag drop
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 HighField-scoped source check 2026-09-28. Standalone 2027 page confirms 18 September 08:30, 81 km, 1700 m, 13 hours, 250 starters, five aid stations and Goring Village Hall start/finish. Entries launch 11 October 2026 19:00. £118 affiliated / £120 unattached; NOT_OPEN as of check. Unspecified fields remain unconfirmed for this edition; prior edition details have not been copied. Only explicitly sourced new-edition facts are populated. Prior-edition route, price, entry status and participation details have not been inherited. Field-scoped check 2026-10-20: 18 September 2027, 81 km, 1,700 m, 13 hours and Goring loop confirmed. SiEntries now accepts entries after the 11 October 2026 19:00 opening, so replace NOT_OPEN. £118 UKA / £120 general. Closure 30 August, time unspecified. Other facts retain their earlier field evidence.
- Successful source check
- 20 Oct 2026
- Catalogue record updated
- 20 Oct 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.
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