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limited placesGB Ultras
Beacons Way Ultra 100K
GB Ultras 50 Mile Series
Next edition: Saturday, 24 July 2027 – Sunday, 25 July 2027Llangynidr to Llangadog, Wales
A point-to-point 100K across Bannau Brycheiniog, combining substantial climbing with mountain weather, technical ground and a full-day-to-night race window.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance62.1 mi
Ascent3,178m
Climb / km31.8m
Cutoff24h
Cutoff pace14:24/km
Technicality7.8/10
Entry£139
FormatPoint-to-point
Next edition
24 July 2027 – 25 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.
Past editions
2026 to Completed
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 100 km
- Ascent
- Not verified
- Cutoff
- Not published
- Entry
- Not verified
- Format
- Not published
- Stage layout
- Not applicable
Successful source check: 1 Sept 2026Source confidence: highThe official GB Ultras volunteer calendar verifies the Beacons Way Ultra 100K 2026 date and advertised distance. Edition-specific elevation, cutoff, price, support and route facts remain unknown rather than being copied from 2027.
Check Beacons Way Ultra 100K 2026 source (opens in a new tab)
Race For You difficulty
5.6/ 10
Hard
High evidence confidence · 94% evidence coverage
This score is driven most by technical terrain, exposure and self-sufficiency. 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 percent5 out of 10
Climbing, weighted 25 percent5.3 out of 10
Technicality, weighted 15 percent7.8 out of 10
Accumulated burden, weighted 17 percent4 out of 10
Exposure & support, weighted 13 percent7.5 out of 10
Course analysis
What shapes this race
Expect sustained upland ground and meaningful climbing, sections where foot placement and downhill confidence matter.
trailmountainfelltechnical
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
High pressure
To finish inside 24h, the raw average required is 14:24 per kilometre (23:11 per mile), including every stop.
Raw pace14:24/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?
Better suited to runners with prior ultra, mountain or technical-terrain experience than to somebody choosing their first ultra.
3.2/10 suitability
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
extensive 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 Beacons Way Ultra 100K, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
Aid stations6 listed
Support levelaid stations
LogisticsParking noted
LogisticsAccommodation nearby
LogisticsBag drop
LogisticsCrew access
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 HighThe official 2027 event page, series and registration verify the 24–25 July window, 100K, 3,178m, 24-hour overall cutoff, £139, 250 places, six checkpoints and self-navigation. The separate 21-hour Western States threshold is not stored as the race cutoff; current availability is limited.
- Successful source check
- 3 Sept 2026
- Catalogue record updated
- 3 Sept 2026
- Official source
- Available
Official source 1 (opens in a new tab)Official source 2 (opens in a new tab)Official source 3 (opens in a new tab)Official source 4 (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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