The Pesio is a 48.8-kilometre (30.3 mi)[1] long river in northwestern Italy (Piedmont).

Its source is on the Northern slopes of the Marguareis, the highest summit of the Ligurian Alps.

[3] The Pesio then follows its course through the plain heading North up to Morozzo, where it gets from the left its main tributary, the Brobbio, and turns NE.

Then, with some meander, reaches the Tanaro a couple of km South of Carrù.

[4] Media related to Pesio at Wikimedia Commons