Course de l'Ours des Cavernes 2026

Course de l'Ours des Cavernes is a trail running event held in Kletno, a village in Lower Silesia, Poland. It takes place in late August and provides four distances, ranging from a 10 km trail race to a 51 km effort. All races begin in Kletno, focusing on mountain-style trail running instead of road racing. The available distances are 10 km, 16 km, 25 km, and 51 km, suitable for new trail runners and those seeking a long day on challenging terrain. Recent race-day conditions were mild but humid, with an average temperature around 19°C, moderate wind, and high humidity. The same location also hosts a spring Marche de l'Ours des Cavernes, offering an alternative for walkers or participants not focused on racing.