It follows a winding course through Tingerup Tykke before turning to the north, where it runs through Gøgsmosen, near Rønedde, and further towards Hovmosen, near Gisselfeld, where it is joined by Brødebæk, Slettehavebæk and Kællingerend to form the Suså proper.

From there it forms arc to the northwest, running past Haslev, Ringsted and Sorø before eventually turning south towards Næstved, where it drains into Karrebæksminde Bay.

[4] The river lacks the twists-and-turns and bed material needed for optimal plant and animal life.

The Danish Nature Agency recommends that the maintenance of the waterway be less heavy-handed in future and has identified a surplus of nutrients in Lake Tystrup-Bavelse.

[5] In 1937, the completion of a canal between Karrebæksminde and Næstved allowed ships to navigate all the way up to the city, where a new harbour was built.

Remains of the former river harbour can still be seen in Næstved, including an old paper mill built along the Suså—replaced by a factory in the new harbour—and 'kraneø' (lit.