23.4km is the 23.4km trail race at Trail na Mljetu 2026 (Nacionalni park Mljet, Croatia). The race starts on May 2, 2026.
Run the climb at race pace, build your speed on the downhill, and go all out at the finish.
The course climbs 840m+. With 36m/km of climbing, this is a rolling, mostly runnable course. By gradient, 28% of the distance is uphill, 39% downhill and 33% flat. The longest climb runs 5.2km at an average 5.6% grade (293m of vertical). The longest descent runs 5.0km at an average 6.4% grade (323m of vertical). The steepest climb averages 22.5% over 0.5km. The steepest descent drops at 23.5% over 0.3km. Surface: 63% trail, 19% road, 11% technical, and 5% smooth. Flat-equivalent effort: 32.9 FlatKM.
The highest summit on the course is Veliki Planjak (392m), 14.5km from the start. The course also passes close to Korubica (347m) and Debela glavica (123m).
The course is runnable enough that trekking poles are not needed.
Quad damage risk is low (index 11 of 100): a few descents worth noting, none of them decisive.
On race day, start temperatures have historically ranged from 15°C to 23°C, with around 18°C at the highest point; the chance of precipitation is about 31%. Heavy rain of 10.0mm or more falls on about 8% of days around this date.
27 finishers completed the 2026 edition. Men's winner: Romain Mathieu (France) in 2:25:47. Women's winner: Michaela Kucháriková (Slovakia) in 2:32:26.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 23.4km.
Other distances of Trail na Mljetu 202642km (42.0km)·13km (13.0km)
Other editions of 23.4km2025
Official websitethegreatrefresh.com/mljet-trail
