Skip to content
Endurance AnalyticsEndurance Analytics
  • Calendar
  • Trail Finder
  • Geo Quiz
  • Challenges
  • Blog
Trail runningBiathlonSkiingSkimoOlympicsCalendarTrail FinderGPX AnalyzerRace Pace CalculatorChallengesComparePricingConnect AIBlog

Know the course before you run it

© 2026 Endurance Analytics. All rights reserved.

Privacy policyTerms of serviceRefundsContact
  1. Home
  3. Trail running
  5. 2026
  7. Vucko Trail
Vucko Trail
105km10560km6040km4026km2614km14

YELLOW COURSE

26.0km·1300m+
June 19
Bjelašnica, Sarajevo,
Bosnia & Herzegovina
source

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: Bosnia & Herzegovina

Read

  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents
  • Downhill Running Muscle Damage: Why Descents Wreck Quads

YELLOW COURSE · Race profile

Distance
26.0km
Gain
1300m+
FlatKM
36.7
Max
1673m
Min
1255m

About YELLOW COURSE

YELLOW COURSE is the 26.0km trail race at Vucko Trail 2026 (Bjelašnica, Sarajevo, Bosnia & Herzegovina). The race starts on June 19, 2026.

Race strategy

Run hard on the first mountain, but save energy for the second.

  • Start easy and control your HR up to Siljevača.
  • Hold your race pace up to 23.1km, but stay in control.
  • Control your HR on the first climb, then run your race pace, and go all out on the final descent from 23.1km.
  • Start · 0.0km–1.7km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 1.7km–11.2km · Climb of 417m, high point 1673m. Plus 1 more climb. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can.
  • Work · 11.2km–23.1km · Plus 1 more descent. This is where the race is built: steady, solid effort. Running pays off here: run wherever you can.
  • Home · 23.1km–27.0km · Descent of 310m averaging 8%. Build to the finish: leave whatever you have left out on the course.

Course

The course climbs 1300m+. With 50m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 45% of the distance is uphill, 44% downhill and 11% flat. The longest climb runs 3.1km at an average 13.4% grade (417m of vertical). The longest descent runs 3.9km at an average 8.0% grade (310m of vertical). The steepest climb averages 30.2% over 0.4km. The steepest descent drops at 28.8% over 0.3km. Surface: 72% trail, 18% smooth, and 6% road. Flat-equivalent effort: 36.7 FlatKM.

Summits

The highest summit on the course is Šiljak (1689m), 3.1km from the start. Other named summits along the route: Veliki Hrakač (1619m). The course also passes close to Siljevača (1662m).

Poles

Poles bring little benefit here: only about 0.7km of pole-friendly terrain.

Quad damage

Quad damage risk is low (index 17 of 100): a few descents worth noting, none of them decisive.

  • Control your HR on the first climb, then run your race pace, and go all out on the final descent from 23.1km.
  • 11.2–14.1 km · 301 m D−, -10.4% · 12.9 km ahead → your pace
  • 23.1–27.0 km · 310 m D−, -8.0% · 0.0 km ahead → free

Weather

On race day, start temperatures have historically ranged from 12°C to 22°C, with around 16°C at the highest point; the chance of precipitation is about 37%. Heavy rain of 10.0mm or more falls on about 7% of days around this date.

This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for YELLOW COURSE.

Other distances of Vucko Trail 2026BLACK COURSE (105km)·RED COURSE (60.0km)·BLUE COURSE (40.0km)·GREEN COURSE (14.0km)

Official websitevuckotrail.ba/bs