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entries closedRun Walk Crawl
Rasus y Bannau 100K
Rasus y Bannau series
Next edition: Friday, 2 April 2027 – Saturday, 3 April 2027Brecon town centre, Wales
The headline Rasus y Bannau mountain race, marketed as 100K while its detailed route is longer.
Start · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.
Location evidence
Current official2027 product-specific starts are in Brecon town centre, superseding Llangors. Small Brecon locality, Powys; parking at theatre does not establish start point. Uses new source refinement checked in this pass. GeoNames supplies a representative locality or named-landmark point. This is approximate event area, not exact start-line coordinates. GeoNames, CC BY 4.0; https://www.geonames.org/about.html
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.
Distance64.6 mi
Ascent5,400m
Climb / km51.9m
Cutoff30h
Cutoff pace17:19/km
TechnicalityUnknown
Entry£99
FormatLooped
Next edition
2 April 2027 – 3 April 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
- 104 km
- Ascent
- 5,100m
- Cutoff
- 24h
- Entry
- £99
- Format
- continuous · single stage · looped
- Stage layout
- Not applicable
Successful source check: 3 Sept 2026Source confidence: highThe organiser-controlled 2026 listing and official tracker support the completed 100K-class race with a detailed 104K distance, 5,100m, 24-hour window and £99 fee. The nominal-versus-detailed distance remains explicit.
Check Rasus y Bannau 100K 2026 source (opens in a new tab)
Race For You difficulty
5.6/ 10
Hard
Moderate input evidence · 73% evidence coverage
The main recorded demands are high climbing demand. 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 0.00 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. 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 percent5.1 out of 10
Climbing, weighted 25 percent7.1 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent4.1 out of 10
Exposure & support, weighted 13 percent5.7 out of 10
Course analysis
What shapes this race
Expect sustained upland ground and meaningful climbing, sections where foot placement and downhill confidence matter, exposed moorland where weather can amplify the difficulty.
trailmountainmoorlandtechnical
Climbing density
51.9m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
Moderate pressure
To finish inside 30h, the raw average required is 17:19 per kilometre (27:52 per mile), including every stop.
Raw pace17:19/km
PressureModerate 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
partially marked
Do not assume closed-road-race levels of signage. Know the organiser’s navigation requirements and keep the official route available.
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 Rasus y Bannau 100K, your potential buffer and the biggest change in demand.
Latest verification
Trust the source, see the gaps.
Data HighThe official 2027 pages verify the 2–3 April window, 104K detailed route, 5,100m, 30 hours and £99. The 100K headline remains an event name rather than false measured precision. Entry availability checked 28 September 2026: SI Entries states new entries closed on 16 September 2026 at 20:00. The event remains scheduled; closure is not cancellation evidence. Field-scoped check 2026-09-28: Current 2027 official race summary publishes revised ascent by distance. Official edition-specific SI Entries explicitly states new entries closed on 16 September 2026 at 20:00. The scheduled event remains future; the verified closure affects entry availability, not occurrence or cancellation. Only these facts were reviewed; other details retain their previous source dates.
- Successful source check
- 3 Sept 2026
- Catalogue record updated
- 28 Sept 2026
- Official source
- Available
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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