23.4km is the 23.4km 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 840m+. With 36m/km of climbing, this is a rolling, mostly runnable course. By gradient, 28% of the distance is uphill, 38% downhill and 35% flat. The longest climb runs 5.2km at an average 5.7% grade (293m of vertical). The longest descent runs 5.0km at an average 6.4% grade (322m of vertical). The steepest climb averages 23.3% over 0.5km. The steepest descent drops at 24.8% over 0.2km. Surface: 62% trail, 19% road, 11% technical, and 5% smooth. Flat-equivalent effort: 32.7 FlatKM.
The highest summit on the course is Veliki Planjak (392m), 14.4km 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 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 23.4km.
Other distances of Trail na Mljetu 202742km (42.0km)·13km (13.0km)
Other editions of 23.4km2026·2025
Official websitethegreatrefresh.com/mljet-trail
