The Krausidon, Greek: Κραυσίδων, with a length of 12 km, the longest torrent that runs solely in the interior of Volos. It has its origin in the Pelion Mountains in central Pelion, flowing southwest to Pagasetic Gulf, Greece.
The places that the river flows through include Volos, Nea Ionia, Magnesia, Portaria in Greece. Reservoirs on the Krausidon include a dam. There are a number of bridges over the river.
The city of Volos was flooded on October 10, 2006, one of the prefecture's worst recorded floods. The flood devastated crops and groves and many homes. A railroad bridge connecting Volos and Larissa collapsed when the central stone support was ruined by a combination of rocks, mud and debris carried by a swollen river. Almost one fifth of the city faced severe mudslides.
List of rivers of Greece