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Rat Race 100: Edinburgh Castle to Glamis Castle
Rat Race 100 Series
Next edition: Saturday, 24 July 2027 – Monday, 26 July 2027Edinburgh Castle to Glamis Castle, Scotland
A fully supported 100-mile point-to-point journey from central Edinburgh through Fife and Angus to Glamis Castle, with a comparatively runnable road-to-trail profile and a 48-hour completion 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.
Distance99.4 mi
AscentUnknown
Climb / kmUnknown
Cutoff48h
Cutoff pace18:00/km
Technicality3/10
Entry£339
FormatPoint-to-point
Next edition
24 July 2027 – 26 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
- 160 km
- Ascent
- 1,538m approx.
- Cutoff
- 48h
- Entry
- Not verified
- Format
- continuous · single stage · point to point
- Stage layout
- Not applicable
Successful source check: 1 Sept 2026Source confidence: highThe official 2026 event guide verifies the 25 July start, 100-mile route, 48-hour pacing plan, nine pit stops and overnight format. Its organiser-linked final GPX reports 1,537.95m elevation gain, stored as an approximate 1,538m because live safety diversions can differ. The end date is derived from the stated 48-hour window; entry price remains unknown.
Check Rat Race 100: Edinburgh Castle to Glamis Castle 2026 source (opens in a new tab)
Race For You difficulty
6.7/ 10
Hard
Moderate evidence confidence · 69% evidence coverage
This score is driven most by substantial race distance. 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 percent6.8 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent3 out of 10
Accumulated burden, weighted 17 percent5.6 out of 10
Exposure & support, weighted 13 percent5.5 out of 10
Course analysis
What shapes this race
Expect largely runnable, non-technical surfaces.
roadtrailmixednon-technical
Cutoff analysis
Lower pressure
To finish inside 48h, the raw average required is 18:00 per kilometre (28:58 per mile), including every stop.
Raw pace18:00/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.
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?
A realistic target for a prepared runner with some trail or ultra experience, but not the softest possible introduction to the distance.
5.5/10 suitability
Navigation
fully marked
The route is described as marked, but runners should still read the final race instructions.
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
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
Support levelfully supported
LogisticsPublic transport possible
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 PartialThe official event page verifies the 24–26 July 2027 dates, 160K distance, 48-hour window, full waymarking/support and £339 price. Elevation and 2027-specific pit-stop locations remain unpublished and were not copied from 2026.
- Successful source check
- 1 Sept 2026
- Catalogue record updated
- 1 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?
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Wrong cutoff? Date changed? New course? Tell us what moved and include the official source if you have it.
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