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past editionWelsh Coast Runners
St Illtyds Ultra Marathon 100K
Past edition: Date TBCBurry Port, Wales
The former 100K St Illtyds Ultra product, retained separately from its 50K companion.
Official race site (opens in a new tab)
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Distance62.1 mi
AscentUnknown
Climb / kmUnknown
CutoffUnknown
Cutoff paceUnknown
TechnicalityUnknown
EntryNot verified
Formatcontinuous
Latest past edition
Date TBC
Next edition not yet announced
No confirmed future edition is currently recorded in our sources. The facts below describe the scheduled 2017 edition and are retained for comparison and runner history. An elapsed date does not confirm that the event took place.
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
5/ 10
Moderate
Limited input evidence · 26% 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 0.00 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 percent5 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent3.5 out of 10
Exposure & support, weighted 13 percent5.1 out of 10
Course analysis
What shapes this race
The course combines trail, coastal, mixed terrain.
trailcoastalmixed
Cutoff analysis
Unknown
The official overall cutoff has not yet been verified. Race For You will not estimate one.
Who this suits
First ultra?
There is not enough verified information to assess first-ultra suitability yet.
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.
Latest verification
Trust the source, see the gaps.
Data PartialThe official result verifies the separate 2017 100K product and one 100K finisher. Entrants recorded as stopping at 50K remain 100K non-finishers and must not be reclassified as 50K finishes.
- Successful source check
- 3 Sept 2026
- Catalogue record updated
- 3 Sept 2026
- Official source
- Available
Still unverified: date, 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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