Pierścień Tysiąca Jezior in 2025, a cycling event organized in Lubomino (Poland) from 5 / 6 July. During the 3 races were held event. Course 135k (⨦ 136.5 km / + 900 m) in class GDX3 with average terrain slope 1% (G1). Course 310k (⨦ 309.5 km / + 2 100 m) in class GDX5 with average terrain slope 1% (G1). Course 605k (⨦ 605.5 km / + 4 250 m) in class GDX8 with average terrain slope 1% (G1).