BLUE COURSE

40.0km·1800m+

June 19

Bjelašnica, Sarajevo,

Bosnia & Herzegovina

source

Set your ITRA PI

Estimated Finish

5:16:07

ITRA PI

Segment Details

1/5

+7.6% · 1.15km · 87m+ · 0m-

1339m1252m

0.00km1.15km

OSM ↗

highway

track 92%path 8%

surface

unpaved

Elevation Profile

Trail 79% · Extreme 1%Extreme 1%

2.6TDI

39.6km

56.4FlatKM

1586m+

1585m−

1749max

1252min

1:24

11.7km

0:48

6.3km

0:55

6.9km

1:10

7.0km

0:59

7.6km

OSM

AID

Distance

Time

Gain

Loss

Gels

Water

Salts

Segment

11.7km/11.7km

1:24/1:24

670m+

334m−

1.5×40g(59g)

1.1L

3(600mg)

18.1km/6.3km

2:12/0:48

203m+

341m−

0.8×40g(34g)

0.6L

2(400mg)

25.0km/6.9km

3:07/0:55

344m+

316m−

1.0×40g(38g)

0.7L

2(400mg)

32.0km/7.0km

4:17/1:10

287m+

388m−

1.2×40g(49g)

0.9L

2(400mg)

39.6km/7.6km

5:16/0:59

354m+

490m−

0.5×40g(20g)

0.7L

2(400mg)

AID

Distance

Time

Gels

Water

Salts

Gradient Matrix

Extra

Select a gradient

Uphill

Downhill

>40%

30%

25%

20%

15%

10%

0.5

0.3

0.2

0.3

0.5

Uphill

>40%

30%

25%

20%

15%

10%

0.2

0.3

0.5

10%

15%

20%

25%

30%

>40%

Downhill

Technical sections presentDarker — steeper and longer

Extremes

Gradient Breakdown

40% / 15.8km21% / 8.3km39% / 15.5km

Uphill

20–25%×21.1km

15–20%×42.1km

10–15%×41.7km

3–10%×1510.9km

Downhill

25–30%×10.4km

20–25%×10.6km

15–20%×30.9km

10–15%×94.0km

3–10%×149.6km

Peaks for this course have not been detected yet.

Skyrunning · ISFSource

ISF technical requirements

Average incline4.0%> 6.0%

Steep sections (30%+)0.0%≥ 5.0%

Max altitude1749 m> 2000 m

Vertical climb1586 m> 1300 m

Asphalt4.3%< 15.0%

UIAA Technical climbing0.4 kmGrade I–II

Possible level

1+23

estimated · high confidence

Level 10/1

Peak reachno detection

Level 21/3

Altitude ≥ 3000 m1749 m

Scrambling393 m

Rocky footing0 m

Level 31/3

Via ferrata0 m

Glacier0 m

Exposed ridge^*393 m

* feature detected but below the confident-length floor

About BLUE COURSE

BLUE COURSE is a 40.0 km trail race of Vucko Trail 2026 in Bjelašnica, Sarajevo, Bosnia & Herzegovina. The race starts on June 19, 2026. The course climbs 1800 m+ and descends 1585 m−, between a low point of 1252 m and a high point of 1749 m. By gradient, 40% of the distance is uphill, 39% downhill and 21% flat. The longest climb runs 2.4 km at an average 14.2% grade (345 m of vertical). The longest descent runs 2.5 km at 4.8% (119 m of vertical). Surface: 80% trail and 15% smooth. Flat-equivalent effort: 56.4 FlatKM.

This page has the interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for BLUE COURSE.

Other distances of Vucko Trail 2026BLACK COURSE (105 km)·RED COURSE (60.0 km)·YELLOW COURSE (26.0 km)·GREEN COURSE (14.0 km)

Other editions of BLUE COURSE2025

Official websitevuckotrail.ba/bs