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BigMud Trails 50K
Classic Element Trail Series
Next edition: Sunday, 21 February 2027Queen Elizabeth Country Park, Horndean PO8 0QE, England
BigMud Trails 50K is the South Downs Earth race in the Classic Element Trail Series, based at Queen Elizabeth Country Park.
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Distance31.1 mi
AscentUnknown
Climb / kmUnknown
Cutoff8h 30m
Cutoff pace10:12/km
TechnicalityUnknown
Entry£68
FormatLooped
Next edition
21 February 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
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/ 10
Moderate
Limited evidence confidence · 54% evidence coverage
This score is driven most by balanced overall demands. 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 percent3 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent1 out of 10
Exposure & support, weighted 13 percent2.7 out of 10
Course analysis
What shapes this race
The course combines trail, mixed terrain.
trailmixed
Cutoff analysis
High pressure
To finish inside 8h 30m, the raw average required is 10:12 per kilometre (16:24 per mile), including every stop.
Raw pace10:12/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.
Because ascent is not verified, Cutoff Pressure V2 uses the model's neutral 20m/km reference density. This assumption does not fill the ascent value or make missing evidence look easy.
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
light kit
Night running is not expected for most entrants based on the current format, but final kit rules still take priority.
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 stations5 listed
StartQueen Elizabeth Country Park, Horndean PO8 0QE
FinishQueen Elizabeth Country Park, Horndean PO8 0QE
Support levelaid stations
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 2027 edition sources were reviewed on 4 September 2026 and support the recorded date, distance, cutoff state, format and lifecycle. Unresolved facts remain marked unknown rather than being inferred.
- Successful source check
- 4 Sept 2026
- Catalogue record updated
- 4 Sept 2026
- Official source
- Available
Still unverified: elevation.
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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