Julian Alps Trail Run - INTERSPORT SPEED 15K 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 3 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.
Predicted race time based on your UTMB Index® · smoothed times achieved by runners at your level in past editions
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Cut-off times and crew - Julian Alps Trail Run - INTERSPORT SPEED 15K · 2026
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| Tofov graben | 6.7 | 0 m | 6.7 | 256 m | 164 m | Forbidden | — | — |
| Gozd Martuljek | 9.9 | 0 m | 3.3 | 13 m | 159 m | Forbidden | — | — |
| Kranjska Gora | 17.3 | 0 m | 7.4 | 283 m | 225 m | — | Sun 02:45 PM | — |
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 | Tofov grabenkm 6.7 | Gozd Martuljekkm 9.9 | Kranjska Gorakm 17.3 |
|---|---|---|---|
| Water | available | available | available |
| Brand products · Näak | available | available | unavailable |
| Hot meal | unavailable | unavailable | available |
La feuille de ton assistance pour Julian Alps Trail Run - INTERSPORT SPEED 15K · 2026
L'assistance n'est autorisée sur aucun poste de cette course.
Elevation profile
The course and its aid stations
Julian Alps Trail Run - INTERSPORT SPEED 15K: 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 1h47 to 1h10. These times include aid-station stops: they come from real durations between two timing points, and this race's timing does not measure stops separately.
Source| UTMB® Index | Estimated time | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|
| 500 | 1h47 | — | 107 g | 1.2 L | 892 mg | +2h13 |
| 550 | 1h41 | — | 101 g | 1.2 L | 842 mg | +2h19 |
| 600 | 1h31 | — | 91 g | 1.1 L | 758 mg | +2h29 |
| 650 | 1h26 | — | 86 g | 1 L | 717 mg | +2h34 |
| 700 | 1h19 | — | 79 g | 0.9 L | 658 mg | +2h41 |
| 750 | 1h15 | — | 75 g | 0.9 L | 625 mg | +2h45 |
| 800 | 1h10 | — | 70 g | 0.8 L | 583 mg | +2h50 |
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.
Measured on the 2026 edition: the field checkpoint by checkpoint
627 starters, 0.6% DNF rate, 3 timed checkpoints.
| Segment | km | Median | Middle half | Measured | Median passage | Still ranked |
|---|---|---|---|---|---|---|
| Kranjska Gora - Start → Tofov graben | 6.7 | 51 min | 44 min – 59 min | 624 | 51 min | 625 |
| Tofov graben → Gozd Martuljek | 9.9 | 18 min | 16 min – 22 min | 624 | 1 h 09 | 625 |
| Gozd Martuljek → Kranjska Gora | 17.3 | 1 h 01 | 53 min – 1 h 11 | 622 | 2 h 11 | 623 |
“Median passage” is elapsed time from the start, not a clock time: the clock time depends on the edition.
Where runners drop out. Gozd Martuljek (2) · Kranjska Gora - Start (2) out of 4 total DNFs.
RAVIT record from the official timing of the 2026 edition, data from September 29, 2026.
SourceOther trails worth preparing for
- Julian Alps Trail Run - FUNNY 10K11 km · 417 m D+ · September 19, 2027
- Julian Alps Trail Run - NEXT GEN 10K11 km · 417 m D+ · September 19, 2027
- Julian Alps Trail Run - KRANJSKA GORA 25K25 km · 1,262 m D+ · September 19, 2027
- Mojstrana - Slovenian Alpine Museum Run11 km · 333 m D+ · August 21, 2026
- Mojstrana - Vrata Valley Race26 km · 910 m D+ · August 21, 2026
Julian Alps Trail Run - INTERSPORT SPEED 15K over the years
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 — Julian Alps Trail Run - INTERSPORT SPEED 15K
Weather for Julian Alps Trail Run - INTERSPORT SPEED 15K
The weather for Julian Alps Trail Run - INTERSPORT SPEED 15K 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 Julian Alps Trail Run - INTERSPORT SPEED 15K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Julian Alps Trail Run - INTERSPORT SPEED 15K has 3 checkpoints: 3 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Kranjska Gora: 7.4 km and 0 m elevation gain. That's the one to load up for first.
What distance and elevation gain?
Julian Alps Trail Run - INTERSPORT SPEED 15K is 17 km long with 553 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 1h31 for Julian Alps Trail Run - INTERSPORT SPEED 15K.
What's the weather forecast?
The weather for Julian Alps Trail Run - INTERSPORT SPEED 15K 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 Julian Alps Trail Run - INTERSPORT SPEED 15K?
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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