The river near Vilallonga.
|River mouth||Mediterranean Sea|
|Basin size||752.8 km2 (290.7 sq mi)|
|Length||74.5 km (46.3 mi)|
The river starts at the feet of the Carrasqueta, a mountain area southwest to Alcoi, by the confluence of the Polop and Troncal streams. In its initial part the Serpis is intermittent. Near Alcoi it joins with the Barxell, coming from the Serra de Mariola, after which it has a regular course. Other cities it passes through include Cocentaina, L'Alqueria d'Asnar, Muro d'Alcoi and Beniarrés, where a dam creates an artificial lake; after the latter, the Serpis crosses L'Orxa, Vilallonga, Potries, Beniarjó, Almoines and Gandia, where it flows into the Mediterranean Sea, shortly after receiving the waters of its main affluent, Vernisa river.
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