42km is the 42.0km trail race at Trail na Mljetu 2026 (Nacionalni park Mljet, Croatia). The race starts on May 2, 2026.
Start easy, build your effort, and go all out at the finish.
The course climbs 1400m+. With 33m/km of climbing, this is a rolling, mostly runnable course. By gradient, 27% of the distance is uphill, 34% downhill and 39% flat. The longest climb runs 1.7km at an average 13.7% grade (226m of vertical). The steepest climb averages 32.1% over 0.2km. Surface: 67% trail, 19% road, 6% technical, and 6% smooth. Flat-equivalent effort: 56.4 FlatKM.
Poles bring little benefit here: only about 1.7km of pole-friendly terrain.
Quad damage risk is low (index 18 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 19°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.
10 finishers completed the 2026 edition. Men's winner: Ansbert De Cleene (Belgium) in 4:30:55. Women's winner: Adela Iuliana Popescu (Spain) in 5:15:31.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 42km.
Other distances of Trail na Mljetu 202623.4km (23.4km)·13km (13.0km)
Other editions of 42km2025
Official websitethegreatrefresh.com/mljet-trail
