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entries openYellow Belly Ultras
Yellow Belly Winter 50
Yellow Belly Ultras series
Next edition: Saturday, 20 February 2027Swallow, Lincolnshire Wolds, England
The cold-weather running of Yellow Belly's classic circular 50-mile Lincolnshire Wolds and Viking Way route.
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Distance50 mi
Ascent1,370m*
Climb / km17m
Cutoff18h
Cutoff pace13:25/km
TechnicalityUnknown
Entry£79
FormatLooped
Next edition
20 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
4.1/ 10
Moderate
Moderate evidence confidence · 62% evidence coverage
This score is driven most by balanced overall demands. 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.
Weather, conditions and individual preparation can change the real difficulty significantly.
How the score works Distance, weighted 30 percent4 out of 10
Climbing, weighted 25 percent3.2 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent3.2 out of 10
Exposure & support, weighted 13 percent5.9 out of 10
Course analysis
What shapes this race
The course combines trail, mixed terrain.
trailmixed
Climbing density
17m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
Low–moderate pressure
To finish inside 18h, the raw average required is 13:25 per kilometre (21:36 per mile), including every stop.
Raw pace13:25/km
PressureLow–moderate 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?
There is not enough verified information to assess first-ultra suitability yet.
Exposure & kit
unknown 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 Yellow Belly Winter 50, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
Aid stations4 listed
StartSwallow Village Hall LN7 6DL
FinishSwallow Village Hall LN7 6DL
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 PartialStarts 06:00 at Swallow Village Hall LN7 6DL. Official ascent is 1,370m; do not substitute secondary 1,300m.
- Successful source check
- 3 Sept 2026
- Catalogue record updated
- 3 Sept 2026
- Official source
- Available
Elevation is approximate or awaiting final confirmation.
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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