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past editionWeSwimRun
Dyfi Ultra
Past edition: Saturday, 5 June 2021Aberdyfi, Wales
A historic 50-mile mountain loop from Aberdyfi into the Dyfi and Cadair Idris landscape; the organiser is developing a new route but has announced no new edition.
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 mi
Ascent3,800m
Climb / km47.2m
CutoffUnknown
Cutoff paceUnknown
TechnicalityUnknown
EntryNot verified
FormatLooped
Latest past edition
5 June 2021
Next edition not yet announced
No confirmed future edition is currently recorded in our sources. The facts below describe the scheduled 2021 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
4.8/ 10
Moderate
Limited input evidence · 47% evidence coverage
The main recorded demands are high climbing demand. 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 percent4 out of 10
Climbing, weighted 25 percent6.2 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent2.7 out of 10
Exposure & support, weighted 13 percent5.9 out of 10
Course analysis
What shapes this race
Expect sustained upland ground and meaningful climbing, sections where foot placement and downhill confidence matter, forest trail that may change character in wet conditions.
trailmountainforestmixedtechnical
Climbing density
47.2m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
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.
Navigation
self-navigation
Route-finding is part of the challenge. Carry the required mapping tools and be able to use them in darkness and poor visibility.
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.
Practical detail
Support & logistics
Aid stations6 listed
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 official page links the 2021 tracker/results and preserves the 50-mile, 3,800m, self-navigation and six-checkpoint route; DUV corroborates the exact 5 June date. The checkpoint-three eight-hour control is intermediate, so overall cutoff remains null. A 2022 listing without durable outcome proof is not promoted to an edition.
- Successful source check
- 3 Sept 2026
- Catalogue record updated
- 3 Sept 2026
- Official source
- Available
Still unverified: cutoff, entry price.
Official source 1 (opens in a new tab)Official source 2 (opens in a new tab)Official source 3 (opens in a new tab)
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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