Trójmiejski Ultra Track Zima in 2021, a running event organized in Gdynia (Poland) on 10 April. During the 3 races were held event. Course 65k (⨦ 67.5 km / + 1 750 m) in class RMT4 with average terrain slope 3% (G3). Course 45k (⨦ 43 km / + 600 m) in class RMT3 with average terrain slope 1% (G1). Course 20k (⨦ 20.5 km / + 650 m) in class RMT2 with average terrain slope 3% (G3).