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fullCenturion Running
Chiltern Wonderland 50
Centurion Running
Next edition: Saturday, 19 September 2026Goring-on-Thames, England
A single 50-mile loop from Goring through the Chiltern Hills, combining wooded climbs, historic villages, Ridgeway sections and a fully marked supported course.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance50.3 mi
Ascent1,700m
Climb / km21m
Cutoff13h
Cutoff pace9:38/km
Technicality5.5/10
Entry£115
FormatLooped
Next edition
19 September 2026
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
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
4.4/ 10
Moderate
High evidence confidence · 94% evidence coverage
This score is driven most by balanced overall demands. 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.
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 percent2.4 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
moderate kit
Some entrants may run into darkness depending on pace and start time. Prepare lighting even if your best-case plan finishes earlier.
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-on-Thames
FinishGoring-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 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.
- Successful source check
- 4 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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