UK Ultra South Downs 100 Mile 2026
The forecast arrives five days before the start.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 12 aid stations to plan your nutrition and hydration segment by segment.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Cut-off times and crew - UK Ultra South Downs 100 Mile · 2026
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
| Product | Offhamkm 10.3 | Glyndekm 18.3 | Southeasekm 29.8 | Housedeankm 41.1 | Saddlescombekm 61.0 | Botolphskm 74.5 | Findonkm 87.6 | Burphamkm 101.0 | Houghtonkm 109.4 | Washingtonkm 121.5 | Fulkingkm 140.7 | Ditchlingkm 153.7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available | available | available | available | available |
| Brand products | available | available | available | available | available | available | available | available | available | available | available | available |
La feuille de ton assistance pour UK Ultra South Downs 100 Mile · 2026
Les règles d'assistance de cette course ne sont pas encore connues : tu marqueras tes rendez-vous toi-même.
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
UK Ultra South Downs 100 Mile: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 24h07 to 14h51, and the aid-station stop budget from 1h46 to 0h36. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 24h07 | 1h46 | 10.1 | 1,447 g | 16.9 L | 12,060 mg | +9h53 |
| 550 | 22h21 | 1h27 | 8.4 | 1,341 g | 15.7 L | 11,179 mg | +11h39 |
| 600 | 20h30 | 1h11 | 6.5 | 1,230 g | 14.3 L | 10,246 mg | +13h30 |
| 650 | 18h43 | 0h59 | 4.7 | 1,123 g | 13.1 L | 9,360 mg | +15h17 |
| 700 | 17h02 | 0h49 | 3 | 1,022 g | 11.9 L | 8,513 mg | +16h58 |
| 750 | 15h51 | 0h42 | 1.9 | 951 g | 11.1 L | 7,929 mg | +18h09 |
| 800 | 14h51 | 0h36 | 1 | 891 g | 10.4 L | 7,429 mg | +19h09 |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
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Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — UK Ultra South Downs 100 Mile
Weather for UK Ultra South Downs 100 Mile
The weather for UK Ultra South Downs 100 Mile will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for UK Ultra South Downs 100 Mile, hour by hour on the courseFrequently asked questions
How many checkpoints?
UK Ultra South Downs 100 Mile has 13 checkpoints: 12 aid stations and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Saddlescombe: 19.9 km and 483 m elevation gain. That's the one to load up for first.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
UK Ultra South Downs 100 Mile is 162 km long with 3466 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 20h30 for UK Ultra South Downs 100 Mile.
What's the weather forecast?
The weather for UK Ultra South Downs 100 Mile will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for UK Ultra South Downs 100 Mile?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
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