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Snowdonia Trail Ultra Marathon Eryri
Next edition: Sunday, 11 July 2027Llanberis, Wales
A marked mountain loop from Llanberis through Eryri, with its cancelled 2026 running retained separately from the announced 2027 edition.
Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.
Location evidence
Reused existing evidenced geographic point for exactly the same named event venue/locality and country. Separate saved event-to-place evidence retained; no shared exact start inferred. Conflicting reusable points excluded; unrelated town-only event postcodes excluded. Original geographic verification timestamp retained separately; non-location race facts not reverified. Reused geographic point originally checked 2026-09-14T11:07:18.472Z.
Location checked 2026-09-14.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance34.8 mi
Ascent2,300m*
Climb / km41.1m
Cutoff11h 30m
Cutoff pace12:19/km
TechnicalityUnknown
EntryFrom £99.99
FormatLooped
Next edition
11 July 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.
Cancelled editions
20262026 · Date TBCCancelled
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- Not verified
- Ascent
- Not verified
- Cutoff
- Not verified
- Entry
- Not verified
- Format
- Not verified
- Stage layout
- Not applicable
Successful source check: 2 Sept 2026Source confidence: highThe organiser cancelled the 2026 event for heat and safety. Exact edition metrics are not copied from 2027, and no unverified original race date is stored.
Check Snowdonia Trail Ultra Marathon Eryri 2026 source (opens in a new tab)
Race For You difficulty
4.1/ 10
Moderate
Moderate input evidence · 62% 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 percent3.2 out of 10
Climbing, weighted 25 percent5.1 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent2.1 out of 10
Exposure & support, weighted 13 percent4.3 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.
trailmountainforesttechnicalmixed
Climbing density
41.1m 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 11h 30m, the raw average required is 12:19 per kilometre (19:50 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.
Navigation
fully marked
The route is described as marked, but runners should still read the final race instructions.
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
Will you make the cutoff?
Use a previous result to estimate a realistic range for Snowdonia Trail Ultra Marathon Eryri, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
Aid stations5 listed
StartLlanberis
FinishLlanberis
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 PartialChecked 13 September 2026. Entry status: Open. Published distance: 56 km. Published ascent: 2300 m. Overall time limit: 11.5 hours. Start: Llanberis. Finish: Llanberis. Ascent is approximate. The organiser has redesigned the 11 July 2027 course. The current distance, approximate ascent and explicitly published overall limit are stated above; intermediate checkpoint deadlines are separate controls. Other stored facts retain their previous source review from 2026-09-02. Field-scoped check 2026-09-28: Tier 1 affiliated£96.99 ended 13 September 2026; current Tier 2£99.99 affiliated/£101.99 unaffiliated until 31 December 2026. Additionalfee notstated in reviewed source. Only these facts were reviewed; other details retain their previous source dates.
- Successful source check
- 2 Sept 2026
- Catalogue record updated
- 28 Sept 2026
- Official source
- Available
Elevation is approximate or awaiting final confirmation.
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.
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