Jurajskie Mistrzostwa NA SKRAJU PRZEŁAJU is an off-road running series held in Przewodziszowice near Żarki in Śląskie, Poland. It provides 7 km, 14 km, half marathon, and 30 km distances, allowing participants to select a short trail race or a challenging long-distance run on Jurassic terrain.
The courses traverse the Krakow-Częstochowa Upland near Żarki, featuring Jurassic hills, limestone formations, extensive woodlands, twisting trails, forest paths, and rocky ascents. Grupa ExtremeJura organizes the event, targeting runners who appreciate demanding natural courses, technical segments, and races that prioritize trail running characteristics over road running.