10km is the 10.2km trail race at Kočevsko Outdoor Festival 2026 (Rudniško jezero, Kočevje, Slovenia). The race starts on May 30, 2026. It starts and finishes in Rudniško jezero, Kočevje. The time limit is 3 h.
Short race: go all out.
The course climbs 223m+. With 22m/km of climbing, the course is predominantly runnable. By gradient, 17% of the distance is uphill, 19% downhill and 63% flat. The longest climb runs 5.1km at an average 3.0% grade (152m of vertical). The steepest climb averages 10.4% over 1.1km. Surface: 46% smooth, 35% trail, and 18% road. Flat-equivalent effort: 11.1 FlatKM.
The course is runnable enough that trekking poles are not needed.
There is too little runnable descent to damage the quads: plan the race around climbing and fuelling.
On race day, start temperatures have historically ranged from 12°C to 22°C, with around 17°C at the highest point; the chance of precipitation is about 47%. Heavy rain of 10.0mm or more falls on about 10% of days around this date.
175 finishers completed the 2026 edition. Men's winner: Jan Kriz (Slovenia) in 43:09. Women's winner: Ingrid Kunstelj (Slovenia) in 1:00:03.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 10km.
Other distances of Kočevsko Outdoor Festival 202661.5km (61.5km)·31.7km (31.7km)·14km (14.1km)·Vertical (2.6km)
Other editions of 10km2027·2025
Official websitekocevsko-outdoor.si/en
