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date confirmedBeyond Marathon
King Offa’s Dyke Race
Offa’s Dyke races series
Next edition: Friday, 25 August 2028Sedbury, England to Prestatyn, Wales
One cross-border race identity following Offa’s Dyke Path from Sedbury in England to Prestatyn in Wales.
Official race site (opens in a new tab)
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Distance180 mi
Ascent9,200m
Climb / km31.8m
Cutoff90h
Cutoff pace18:38/km
TechnicalityUnknown
EntryNot verified
FormatPoint-to-point
Next edition
25 August 2028
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 Completed
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 297.7 km
- Ascent
- 9,200m
- Cutoff
- 90h
- Entry
- Not verified
- Format
- continuous · single stage · point to point
- Stage layout
- Not applicable
Successful source check: 2 Sept 2026Source confidence: highThe completed 28 August–1 September 2026 participant guide supports a measured 185 miles/297.7km, 9,200m and 90 hours. The 180-mile headline is retained as the marketed distance; price remains unknown.
Check King Offa’s Dyke Race 2026 source (opens in a new tab)
Race For You difficulty
8.5/ 10
Very hard
Moderate evidence confidence · 67% evidence coverage
This score is driven most by substantial race distance, high climbing demand, accumulated fatigue and format burden. 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 percent8.6 out of 10
Climbing, weighted 25 percent7.3 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent7.9 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, exposed moorland where weather can amplify the difficulty.
trailmountainfellmoorlandmixed
Climbing density
31.8m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
Lower pressure
To finish inside 90h, the raw average required is 18:38 per kilometre (30:00 per mile), including every stop.
Raw pace18:38/km
PressureLower 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
Significant overnight running is likely for many entrants. Lighting, temperature management and sleep strategy can materially affect the outcome.
Personal race predictor
Will you make the cutoff?
Use a previous result to estimate a realistic range for King Offa’s Dyke Race, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
StartSedbury
FinishPrestatyn
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 current official page announces 25 August 2028, 180 miles/289.7km, 9,200m and 90 hours, with registration due to open in August 2027. The 2026 guide's measured 185 miles is not copied forward, and the Sedbury-to-Prestatyn cross-border identity is stored once under Wales.
- Successful source check
- 2 Sept 2026
- Catalogue record updated
- 2 Sept 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?
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