The source is near Salgótarján in Nógrád county. It flows through the towns of Bátonyterenye, Pásztó, Hatvan and Jászberény and flows into the Tisza at Szolnok.
The source is located near Salgótarján in Nógrád county. The watercourse flows through several towns: Bátonyterenye, Pásztó, Hatvan, and Jászberény. It eventually reaches the Tisza River at Szolnok.