The river runs through the Val Sambuco, the Val Lavizzara, and the Valle Maggia, and enters Lago Maggiore between Ascona and Locarno.

The river is used for hydroelectric power production, e.g. with the dams of Lago del Narèt and Lago del Sambuco near the sources.

[1] The Maggia river is a popular scuba diving spot due to its crystal clear waters.

One involved the collapse of a bridge connecting the old Maggia to Aurigeno and Moghegno which killed many people in the 1970s.

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