Izola - Obala Ultra Trail – 108K 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 10 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 - Izola - Obala Ultra Trail – 108K · 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 | Socerbkm 10.0 | Slavnikkm 24.0 | Zazidkm 39.0 | Kubedkm 49.0 | Borštkm 61.0 | Pučekm 72.0 | Šmarjekm 83.0 | Stadion Malijakm 93.0 | Strunjankm 102.0 | Arrivéekm 108.0 |
|---|---|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available | available | available |
| Brand products | available | available | available | available | available | available | available | available | available | unavailable |
| Hot meal | unavailable | unavailable | unavailable | unavailable | unavailable | unavailable | unavailable | unavailable | unavailable | available |
La feuille de ton assistance pour Izola - Obala Ultra Trail – 108K · 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
Izola - Obala Ultra Trail – 108K: 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 20h16 to 11h44, and the aid-station stop budget from 1h05 to 0h23. 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 380, the overall cut-off of 25h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 20h16 | 1h05 | 6.3 | 1,216 g | 14.2 L | 10,130 mg | +4h44 |
| 550 | 18h25 | 0h54 | 4.4 | 1,105 g | 12.9 L | 9,209 mg | +6h35 |
| 600 | 16h43 | 0h45 | 2.7 | 1,003 g | 11.7 L | 8,355 mg | +8h17 |
| 650 | 15h10 | 0h37 | 1.2 | 910 g | 10.6 L | 7,581 mg | +9h50 |
| 700 | 13h51 | 0h32 | 1 | 831 g | 9.7 L | 6,929 mg | +11h09 |
| 750 | 12h47 | 0h27 | 1 | 767 g | 8.9 L | 6,392 mg | +12h13 |
| 800 | 11h44 | 0h23 | 1 | 704 g | 8.2 L | 5,870 mg | +13h16 |
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
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 — Izola - Obala Ultra Trail – 108K
Weather for Izola - Obala Ultra Trail – 108K
The weather for Izola - Obala Ultra Trail – 108K 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 Izola - Obala Ultra Trail – 108K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Izola - Obala Ultra Trail – 108K has 10 checkpoints: 10 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Zazid: 15.0 km and 540 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?
Izola - Obala Ultra Trail – 108K is 108 km long with 4001 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 16h43 for Izola - Obala Ultra Trail – 108K.
What's the weather forecast?
The weather for Izola - Obala Ultra Trail – 108K 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 Izola - Obala Ultra Trail – 108K?
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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