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Bjelasica Ultra Trail
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40K Green Trail

40.0km·1700m+
August 8, 07:00 AM
Kolašin,
Montenegro
source

Race Pace Calculator · GPX Analyzer · Trail Finder

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Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents

Marathon trail race calendar

40K Green Trail · Race profile

Distance
40.0km
Gain
1700m+
FlatKM
55.9
Max
1906m
Min
949m

About 40K Green Trail

40K Green Trail is the 40.0km trail race at Bjelasica Ultra Trail 2026 (Kolašin, Montenegro). The race starts on August 8, 2026 at 07:00 AM. It starts and finishes in Kolašin. The time limit is 9 h.

Race strategy

Run the climb at race pace, build your speed on the downhill, and go all out at the finish.

  • Start easy and control your HR up to Lica.
  • Hold your race pace up to 28.9km, 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 36.3km.
  • Start · 0.0km–2.0km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 2.0km–25.2km · Climb of 960m, high point 1907m. 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 · 25.2km–28.9km · Plus 1 more descent. This is where the race is built: steady, solid effort.
  • Fade · 28.9km–36.3km · Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Running pays off here: run wherever you can. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
  • Home · 36.3km–40.3km · Descent of 429m averaging 11%. No heroics: settle back into your own effort and hold it to the line. Long descent: keep it even and let go only near the end.

Course

The course climbs 1700m+. With 43m/km of climbing, this is a rolling, mostly runnable course. By gradient, 30% of the distance is uphill, 37% downhill and 33% flat. The longest climb runs 9.1km at an average 10.5% grade (960m of vertical). The longest descent runs 4.1km at an average 10.6% grade (429m of vertical). The steepest climb averages 32.5% over 0.3km. The steepest descent drops at 22.6% over 0.8km. Surface: 75% trail, 18% smooth, and 8% road. Flat-equivalent effort: 55.9 FlatKM.

Summits

The highest summit on the course is Velika Miljevača (1930m), 9.2km from the start. Other named summits along the route: Bikovača (1908m) and Lica (1893m).

Poles

Poles bring little benefit here: only about 3.9km of pole-friendly terrain.

Quad damage

Quad damage risk is moderate (index 24 of 100), with 28% of the load in the first half: 0 descents deserve a plan and a couple of downhill sessions before race day.

  • Control your HR on the first climb, then run your race pace, and go all out on the final descent from 36.3km.
  • 25.2–28.9 km · 331 m D−, -9.1% · 11.5 km ahead → your pace
  • 36.3–40.3 km · 429 m D−, -10.6% · 0.0 km ahead → even, let go at the end

Weather

On race day, start temperatures have historically ranged from 13°C to 22°C, with around 16°C at the highest point; the chance of precipitation is about 34%. Heavy rain of 10.0mm or more falls on about 4% of days around this date.

Results

67 finishers completed the 2026 edition. Men's winner: Aldin Rizvic (Bosnia and Herzegovina) in 3:44:30. Women's winner: Lidija Radulović (Serbia) in 4:48:08.

This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 40K Green Trail.

Other distances of Bjelasica Ultra Trail 202660K Red trail (60.0km)·23K Blue Trail (23.0km)·12K Orange Trail (12.0km)

Other editions of 40K Green Trail2025

Official websitebjelasicatrail.me