Lago Bianco (literally White Lake) is a reservoir at the Bernina pass in the Grisons, Switzerland. Its elevation is ; its surface area is . The current reservoir was formed by the two dams Scala and Arlas on the site of two natural lakes (Lago Bianco and Lago della Scala). Its narrow-gauge railroad is the sole rail link from the St. Moritz region to Italy, providing the highest regularly scheduled train service in Europe at this site.