23K Blue Trail

Course

The course climbs 1120m+. With 49m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 28% of the distance is uphill, 35% downhill and 37% flat. The longest climb runs 3.2km at an average 17.2% grade (555m of vertical). The longest descent runs 4.3km at 12.1% (528m of vertical). The steepest climb averages 28.0% over 0.4km. The steepest descent drops at 27.4% over 0.2km. Surface: 72% trail, 14% smooth, and 13% road. Flat-equivalent effort: 31.7 FlatKM.

Summits

The highest summit on the course is Velika Miljevača (1930m), 9.0km from the start. Other named summits along the route: Kobilja glava (1687m). The course also passes close to Kukunovac (1295m).

Poles

Trekking poles are worth taking: about 3.8km of the course favours them.

Quad damage

Quad damage risk is low (index 15 of 100): a few descents worth noticing, none that decides the result.

• Control on the marked descents until km 11, target pace until km 18, free after that. Short descents not listed: target pace.
• #1 · 10.3–14.6 km · 528 m D−, -12.1% · 35% of the race ahead → target pace
• 17.8–21.8 km · 366 m D−, -9.1% · 3% of the race ahead → even, let go at the end

Weather

Historically on race day, start temperatures range from 13°C to 22°C, around 15°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

177 finishers completed the 2026 edition. Men's winner: Miloš Pavlović (Serbia) in 2:07:19. Women's winner: Imogen Pieters (Great Britain) in 2:29:31.