42km is the 42.0km trail race at Trail na Mljetu 2027 (Croatia). The race starts on May 1, 2027.
Run the climb at race pace, build your speed on the downhill, 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, 33% downhill and 40% flat. The longest climb runs 1.6km at an average 13.9% grade (226m of vertical). The longest descent runs 5.1km at an average 6.5% grade (330m of vertical). The steepest climb averages 23.8% over 0.5km. The steepest descent drops at 23.8% over 0.3km. Surface: 66% trail, 19% road, 7% technical, and 7% smooth. Flat-equivalent effort: 56.2 FlatKM.
The highest summit on the course is Veliki Planjak (392m), 32.9km from the start. The course also passes close to Korubica (347m) and Veli Desni Dub (172m).
Poles bring little benefit here: only about 3.1km of pole-friendly terrain.
Quad damage risk is low (index 19 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 32%. Heavy rain of 10.0mm or more falls on about 8% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 42km.
Other distances of Trail na Mljetu 202723.4km (23.4km)·13km (13.0km)
Other editions of 42km2026·2025
Official websitethegreatrefresh.com/mljet-trail
