Julian Alps Trail Run by UTMB 80 km trail running route — Slovenia · Julian Alps

Slovenia · Julian Alps

Julian Alps Trail Run by UTMB

Distance

80 km

Date

September 19, 2026

Entry fee

165 EUR

€ / km

€2.06

UTMB Slovenia: alpine passes, dramatic valleys, and big mountain mileage in the Julian Alps.

Elevation and Terrain

Total Meters

3826m

D+/KM

47.83m/km

For context, the Tor des Géants 330 loop has 73 D+/km.

Avg Uphill Gradient

14.1%

Avg Downhill Gradient

-13.1%

Uphill gradient distribution

2–5%
7.5 km
5–10%
6.4 km
10–15%
3.8 km
15–20%
3.1 km
20%+
6.9 km

Route Profile

Analysed 2026-05-01

Terrain breakdown

36%Uphill29%Flat35%Downhill

Terrain

Alpine

Climbs

Julian Alps Trail Run by UTMB climbs and descents profile

Top climbs

1

3.0 km · 613 m gain

starts km 25 · avg 20.4% · max 51.4%

2

5.3 km · 611 m gain

starts km 16 · avg 11.4% · max 82.2%

3

3.3 km · 552 m gain

starts km 28 · avg 16.9% · max 69.8%

Top descents

1

7.4 km · 536 m drop

starts km 53 · avg -7.2% · max -30.7%

2

3.8 km · 432 m drop

starts km 48 · avg -11.3% · max -53.1%

3

1.6 km · 349 m drop

starts km 46 · avg -21.0% · max -62.8%

Lake Bled 80K Course Profile: 80km, 3,826m D+, 1,700m Climb to Mt. Stol, and 30km of High-Alpine Ridge Running

Q: How hard is the Julian Alps Trail Run by UTMB 80km? A: Among 390 European ultras tracked by DiscoverTrailRaces, the JAT 80K ranks 112th for average uphill gradient steepness -- top 28.7% steepest sustained climbing in the database. The biggest single descent drops 613m at -11.34% average gradient (ranked 225th for descent drama). D+/km ranks 185th at 47.8m/km, near the midpoint for vertical density. Official D+ is 3,826m over 80km, confirmed by both race website and GPX analysis. The race features a defining ascent from Zirovnica to Mt. Stol (2,174m), gaining approximately 1,700m of elevation in one extended mountain section, followed by approximately 30 kilometres of high-alpine ridge running along Stol, Golica, and Klek before descending to the Upper Sava Valley and Kranjska Gora. Maximum race time is 21 hours from an 08:00 Saturday start.

Logistics

Nearest airport

Ljubljana (LJU) / Trieste (TRS) / Venice (VCE)

Notes

Start: ~1.0–2.5 hrs to Kranjska Gora/Bled/Bohinj area depending on distance start (TODO: verify 170K base) / Public transport: good to Bled/Bohinj by bus; Kranjska Gora via bus; race shuttles common / Accommodation: strong in Bled/Kranjska Gora; books out fast (September); book early

Last checked: March 16, 2026Official Website →