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last completed editionRunThrough Trails
Snowdonia Sea2Sky 54K
Last completed: Saturday, 5 September 2026Barmouth and Cadair Idris, Wales
A marked Barmouth beach-to-mountain loop climbing through forest and rocky trail toward Cadair Idris before returning to the coast.
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Distance33.6 mi
AscentUnknown
Climb / kmUnknown
CutoffUnknown
Cutoff paceUnknown
TechnicalityUnknown
Entry£95
FormatLooped
Last completed edition
5 September 2026
Next edition not yet announced
The organiser has not yet published a confirmed future edition in our sources. The facts below describe the 2026 running and are retained for comparison and runner history.
Edition archive
Expand an edition to inspect its year-specific facts. Other years never replace the primary edition facts.
Past editions
2025Completed
These facts belong to the 2025 edition only. Missing values have not been copied from another year.
- Distance
- 53 km
- Ascent
- 1,625m
- Cutoff
- Not published
- Entry
- £85
- Format
- continuous · single stage · looped
- Stage layout
- Not applicable
Successful source check: 2 Sept 2026Source confidence: highThe 2025 official page and UTMB record support 53K, 1,625m and £85. No overall cutoff is published.
Check Snowdonia Sea2Sky 54K 2025 source (opens in a new tab)
Race For You difficulty
4.1/ 10
Moderate
Limited evidence confidence · 26% 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 percent3.1 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent2 out of 10
Exposure & support, weighted 13 percent4.7 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.
trailcoastalforestmountaintechnicalmixed
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
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
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 detailed event page is used for Saturday 5 September and 54K. The organiser's trail index says Friday 4 September, while body copy still says 53K; both conflicts are retained here and no ascent or cutoff is inferred.
- Successful source check
- 2 Sept 2026
- Catalogue record updated
- 2 Sept 2026
- Official source
- Available
Still unverified: elevation, cutoff.
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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