BLACK COURSE

105.0km·5800m+

June 19

Bjelašnica, Sarajevo,

Bosnia & Herzegovina

source

Set your ITRA PI

Estimated Finish

21:02:37

ITRA PI

Segment Details

1/9

+8.0% · 1.32km · 106m+ · 0m-

1358m1252m

0.00km1.32km

OSM ↗

highway

track 94%path 6%

surface

unpaved

Elevation Profile

Trail 70% · Extreme 4%Extreme 4%

3.5TDI

102.3km

172.8FlatKM

5348m+

5345m−

1912max

437min

1:54

11.8km

0:50

6.3km

3:17

17.6km

2:04

9.5km

2:50

15.0km

1:34

8.3km

3:39

14.7km

3:36

13.8km

1:19

5.3km

OSM

AID

Distance

Time

Gain

Loss

Gels

Water

Salts

Segment

11.8km/11.8km

1:54/1:54

716m+

369m−

1.9×40g(78g)

1.4L

4(800mg)

18.1km/6.3km

2:44/0:50

204m+

367m−

0.9×40g(34g)

0.6L

2(400mg)

35.7km/17.6km

6:01/3:17

701m+

1635m−

3.4×40g(134g)

2.5L

7(1400mg)

45.2km/9.5km

8:05/2:04

1024m+

113m−

2.1×40g(84g)

1.5L

4(800mg)

60.2km/15.0km

10:54/2:50

651m+

736m−

2.9×40g(116g)

2.1L

6(1200mg)

68.5km/8.3km

12:28/1:34

696m+

322m−

1.6×40g(64g)

1.2L

3(600mg)

83.2km/14.7km

16:07/3:39

896m+

1462m−

3.7×40g(149g)

2.7L

7(1400mg)

97.0km/13.8km

19:44/3:36

856m+

542m−

3.7×40g(148g)

2.7L

7(1400mg)

102.3km/5.3km

21:03/1:19

206m+

407m−

0.8×40g(33g)

1.0L

3(600mg)

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

43% / 43.7km16% / 16.2km41% / 42.4km

Uphill

30–40%×21.0km

25–30%×20.9km

20–25%×95.5km

15–20%×135.3km

10–15%×128.3km

3–10%×2522.8km

Downhill

>40%×10.2km

25–30%×41.7km

20–25%×104.7km

15–20%×136.0km

10–15%×189.3km

3–10%×3220.5km

Peaks for this course have not been detected yet.

Skyrunning · ISFSource

ISF technical requirements

Average incline5.2%> 6.0%

Steep sections (30%+)1.1%≥ 5.0%

Max altitude1912 m> 2000 m

Vertical climb5348 m> 1300 m

Asphalt4.5%< 15.0%

UIAA Technical climbing3.9 kmGrade I–II

Possible level

1+23

estimated · high confidence

Level 10/1

Peak reachno detection

Level 21/3

Altitude ≥ 3000 m1912 m

Scrambling3864 m

Rocky footing0 m

Level 31/3

Via ferrata0 m

Glacier0 m

Exposed ridge^*1556 m

* feature detected but below the confident-length floor

About BLACK COURSE

BLACK COURSE is a 105 km sky ultra of Vucko Trail 2026 in Bjelašnica, Sarajevo, Bosnia & Herzegovina. The race starts on June 19, 2026. The course climbs 5800 m+ and descends 5345 m−, between a low point of 437 m and a high point of 1912 m. By gradient, 43% of the distance is uphill, 41% downhill and 16% flat. The longest climb runs 5.4 km at an average 16.4% grade (895 m of vertical). The longest descent runs 5.5 km at 15.6% (855 m of vertical). Surface: 71% trail, 21% smooth, and 5% road. Flat-equivalent effort: 172.8 FlatKM.

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

Other distances of Vucko Trail 2026RED COURSE (60.0 km)·BLUE COURSE (40.0 km)·YELLOW COURSE (26.0 km)·GREEN COURSE (14.0 km)

Other editions of BLACK COURSE2025

Official websitevuckotrail.ba/bs