Olsa Kla

The is a river in Poland and the Czech Republic, a right tributary of the River Oder. It flows from the Silesian Beskids mountains through southern Cieszyn Silesia in Poland and the Frýdek-Místek and Karviná districts of the Czech Republic, often forming the border with Poland. It flows into the Oder River north of Bohumín. The Olza-Oder confluence also forms …
The is a river in Poland and the Czech Republic, a right tributary of the River Oder. It flows from the Silesian Beskids mountains through southern Cieszyn Silesia in Poland and the Frýdek-Místek and Karviná districts of the Czech Republic, often forming the border with Poland. It flows into the Oder River north of Bohumín. The Olza-Oder confluence also forms a part of the border.
  • Countries: Poland · Czech Republic
  • Length: 99 km (62 mi) (16 km or 9.9 mi in Poland, 83 km or 52 mi in the Czech Republic) (some sources state 86.2 km or 53.6 mi)
  • Basin size: 1,118 km² (432 sq mi) (639 km² or 247 sq mi in Czech Republic, 479 km² or 185 sq mi in Poland)
  • Progression: Oder→ Baltic Sea
Data from: en.wikipedia.org