The Strone river originates from the small lake of Scarpizzolo, a hamlet located within the territory of San Paolo, located in the Fenile delle Passere area and into which the Strone Basso, or Stronello, and the Fosso Strone flow. The first is a small watercourse that originates from the springs located in Corno, north of the lake, while the second is an artificial watercourse that derives from the merger of the Roggia Torcola and the Roggia Fenarola (which originates near Gerolanuova).[2] The two waterways form the lake through two artificial reservoirs which, through their bulkheads, cause their water to fall several meters, forming the Strone.[3]
In the first 10 kilometres, from Scarpizzolo the Strone flows in a north-south direction towards Cadignano, where it is fed by the Roggia Fiumazzo, and then passes with a very tortuous course between Scorzarolo, where it is fed by the Vaso Lusignolo, and Verolavecchia, before reaching Verolanuova. Near the latter, the Gambaresca Roggia enters it. The last 8 kilometers of the river are characterized by a bumpy course and a certain slope. Between Verolanuova and Pontevico, the river penetrates the Vincellate Park, where there is a jump used for the production of hydroelectric energy. At the Cascina Vincellate, the watercourse is diverted with the municipal Seriola of Pontevico, aimed at irrigating the cultivated fields and then penetrating into the town of the same name and flowing into the Oglio. Like the river that diverted from it, the Strone also flows into the Oglio in Pontevico.