The Valle Verzasca is a valley in the Locarno district of the Canton of Ticino, Switzerland. It comprises the municipalities of Mergoscia, Vogorno, Corippo, Lavertezzo, Brione, Gerra, Frasco, and Sonogno. As of 2004, the total population of 3,200. Mergoscia is at the geographical center of the Ticino, and none of the passes out of the valley cross cantonal or national borders. The valley is formed by the Verzasca River and is situated between the Leventina and the Maggia and culminates at Pizzo Barone.