S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra 2027
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 5 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 - S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra · 2027
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 | Medeazzakm 9.8 | Sela Na Krasukm 27.4 | San Pelagiokm 40.6 | Santa Crocekm 46.2 | Arrivéekm 55.0 |
|---|---|---|---|---|---|
| Water | available | available | available | available | available |
| Brand products | available | available | available | available | available |
Elevation profile
The course and its aid stations
S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra: 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 8h49 to 5h25, and the aid-station stop budget from 0h19 to 0h07. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
Below a UTMB® Index of roughly 345, the overall cut-off of 12h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 8h49 | 0h19 | — | 529 g | 6.2 L | 4,410 mg | +3h11 |
| 550 | 8h00 | 0h15 | — | 480 g | 5.6 L | 4,000 mg | +4h00 |
| 600 | 7h15 | 0h13 | — | 435 g | 5.1 L | 3,622 mg | +4h45 |
| 650 | 6h43 | 0h11 | — | 403 g | 4.7 L | 3,356 mg | +5h17 |
| 700 | 6h12 | 0h09 | — | 372 g | 4.3 L | 3,098 mg | +5h48 |
| 750 | 5h49 | 0h08 | — | 349 g | 4.1 L | 2,905 mg | +6h11 |
| 800 | 5h25 | 0h07 | — | 325 g | 3.8 L | 2,704 mg | +6h35 |
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.
Other trails worth preparing for
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- Trail del Diamante Memorial Cristiano Capelli - Ultra del Diamante 45KM46 km · 2,949 m D+ · October 18, 2026
- ULTRA PIGLIONE TRAIL57 km · 3,760 m D+ · October 18, 2026
- LONG PIGLIONE TRAIL37 km · 2,405 m D+ · October 18, 2026
- Valle dei Segni Wine Trail - 55K57 km · 3,362 m D+ · October 24, 2026
- TRAIL MONTE CASTO - 44 KM45 km · 1,968 m D+ · October 25, 2026
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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 — S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra
Weather for S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra
The weather for S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra 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 S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra, hour by hour on the courseFrequently asked questions
How many checkpoints?
S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra has 5 checkpoints: 5 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Sela Na Krasu: 17.6 km and 722 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?
S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra is 55 km long with 1994 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 7h15 for S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra.
What's the weather forecast?
The weather for S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra 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 S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra?
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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