Polonia·2026

Sosnowiec

Sosnowiec sits in the industrial heartland of Poland's Upper Silesia, with rolling terrain and plenty of local cycling traffic. The Tour De GZM ultramarathon circuits the entire Górnośląsko-Zagłębiowska Metropolia region at 390km, though most riders tackle shorter loops like the 25km Murckowski Rajd Rowerowy through nearby mining areas. Running is tougher here—flat town routes dominate, but the Runmageddon Katowice Hałda Kostuchna obstacle course pulls athletes into the surrounding hills 15km away.