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Eryri 80K
Eryri by UTMB series
Next edition: Friday, 14 May 2027 – Saturday, 15 May 2027Caernarfon to Llanberis, Wales
Eryri 80K is a technical mountain race in Eryri, retaining the permanent identity of the former Ultra-Trail Snowdonia 80K product.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance48.5 mi
Ascent2,500m
Climb / km32.1m
Cutoff16h
Cutoff pace12:19/km
TechnicalityUnknown
EntryNot verified
FormatUnknown
Next edition
14 May 2027 – 15 May 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
Expand an edition to inspect its year-specific facts. Other years never replace the primary edition facts.
Past editions
2026 to Past edition
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 78 km
- Ascent
- 2,500m approx.
- Cutoff
- 16h
- Entry
- Not verified
- Format
- continuous · single stage · point to point
- Stage layout
- Not applicable
Successful source check: 2 Sept 2026Source confidence: highThe official header and event schedule publish a 20:00 Caernarfon start and 12:00 Llanberis close. Conflicting 19:30 prose is not used; no unverified price is stored.
Check Eryri 80K 2026 source (opens in a new tab)
Race For You difficulty
4.6/ 10
Moderate
Limited input evidence · 35% 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 0.15 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 percent3.9 out of 10
Climbing, weighted 25 percent4.9 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent2.6 out of 10
Exposure & support, weighted 13 percent5.5 out of 10
Course analysis
What shapes this race
Expect sustained upland ground and meaningful climbing, sections where foot placement and downhill confidence matter.
trailmountaincoastaltechnicalmixed
Climbing density
32.1m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
High pressure
To finish inside 16h, the raw average required is 12:19 per kilometre (19:47 per mile), including every stop.
Raw pace12:19/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.
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.
Practical detail
Support & logistics
StartCaernarfon
Support levelunknown
UTMBIndex not listed · 3 Stones
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 PartialField-scoped review 2026-10-28: The 2027 organiser race page confirms Friday 14 May at 20:00, 78km, 2,500m ascent, a 16-hour limit and registration available. Its event metadata gives the 15 May finish. Only these edition-specific facts are included. Unverified edition-specific facts remain unknown.
- Successful source check
- 28 Oct 2026
- Catalogue record updated
- 28 Oct 2026
- Official source
- Available
Still unverified: 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.
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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