Loading Race For You
Loading page content.
entries openCoastal Trail Runners (Hayley Coles and Dan Clark)
Five Rivers Ultra 100 Mile
Five Rivers Ultra
Next edition: Saturday, 15 May 2027 – Sunday, 16 May 2027Blaxhall Village Hall, Blaxhall, Suffolk, England
Five Rivers Ultra 100 Mile is a 100-mile point-to-point trail race around five estuaries on the Suffolk and Essex coast.
Start · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.
Location evidence
Current 2027 organiser specifically gives Blaxhall Village Hall start; small Blaxhall Suffolk locality provides conservative approximation. 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.
Distance100 mi
AscentUnknown
Climb / kmUnknown
Cutoff32h
Cutoff pace11:56/km
TechnicalityUnknown
EntryFrom £109
FormatPoint-to-point
Next edition
15 May 2027 – 16 May 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
This is the only edition currently stored for this race family. Earlier verified editions can be added without changing the permanent race URL.
Check the official race source (opens in a new tab)Race For You difficulty
6.8/ 10
Hard
Limited input evidence · 48% evidence coverage
The main recorded demands are substantial race distance. 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 percent6.8 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent5.6 out of 10
Exposure & support, weighted 13 percent5.7 out of 10
Course analysis
What shapes this race
The course combines coastal, trail, mixed terrain.
coastaltrailmixed
Cutoff analysis
High pressure
To finish inside 32h, the raw average required is 11:56 per kilometre (19:12 per mile), including every stop.
Raw pace11:56/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.
Because ascent is not verified, Cutoff Pressure V2 uses the model's neutral 20m/km reference density. This assumption does not fill the ascent value or make missing evidence look easy.
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
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.
Practical detail
Support & logistics
Aid stations10 listed
Finish1912 Centre, Harwich, Essex
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. Navigation: partially marked. Other stored facts retain their previous source review from 2026-09-04. Checked 28 September 2026: Current entry from £109 affiliated / £111 unaffiliated through 31 December 2026; published next tier from 1 January 2027 is £135 affiliated / £137 unaffiliated. Registration is open. Field-scoped check 2026-09-28: Edition-specific registration table publishes current early-bird fee through 31 December 2026; prior price is the higher tier from 1 January 2027. Published minimum is the affiliated early-bird price; unaffiliated runners pay £2 extra. Only these facts were reviewed; other details retain their previous source dates.
- Successful source check
- 4 Sept 2026
- Catalogue record updated
- 28 Sept 2026
- Official source
- Available
Still unverified: elevation.
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.
Report an updateKeep exploring
Browse the race catalogue
Use explicit distance, place, date, terrain and format filters to compare current races.