Bison Ultra Trail 2021

Bison Ultra Trail in 2021, a running event organized in Supraśl (Poland) from 2 / 3 October. During the 5 races were held event. Trasa 103k (⨦ 104.5 km / + 950 m) in class RMT5 with average terrain slope 1% (G1). Trasa 50k (⨦ 50.5 km / + 550 m) in class RMT3 with average terrain slope 1% (G1). Trasa 35k (⨦ 36 km / + 400 m) in class RMT2 with average terrain slope 1% (G1). Trasa 16k (⨦ 16.5 km / + 250 m) in class RMT1 with average terrain slope 1% (G1). Trasa 70k (⨦ 70 km / + 700 m) in class RMT4 with average terrain slope 1% (G1).