Dique Potrerillos

Dique Potrerillos is a stunning freshwater dive destination set in the dramatic pre-Andean landscape of Mendoza province, Argentina. This beginner-friendly reservoir, formed by the Potrerillos dam on the Rio Mendoza, has quickly become one of the most popular inland dive sites in the Cuyo region since its completion in the early 2000s. The reservoir is surrounded by rugged mountain scenery that creates a spectacular setting for diving. Arid, sun-baked mountains in shades of ochre and rust rise sharply from the deep blue waters, providing a visual contrast that is uniquely Argentine. At altitude in the Andean foothills, the thin mountain air and brilliant sunshine combine with the crystal-clear water to create diving conditions that feel remarkably different from any ocean experience. Underwater, Potrerillos reveals a landscape that tells the story of the river valley before it was flooded. Submerged rock formations, old riverbed features, and geological structures create a varied terrain that rewards exploration. The rocky slopes descend at various angles, offering different depth options for divers to choose based on their comfort level and certification. The freshwater clarity at Potrerillos can be outstanding, particularly during periods of low runoff. When conditions align, divers enjoy visibility that allows them to appreciate the full scope of the underwater landscape, with light playing through the water in ways that create ethereal, almost dreamlike diving conditions. Aquatic life in the reservoir includes introduced trout species and native fish that have adapted to the reservoir environment. While the biodiversity does not compare to tropical ocean diving, the fish encounters here have their own charm - trout in particular can be large and curious, providing interesting subjects for underwater photography. Water temperatures follow the continental mountain climate, with the warmest and most comfortable diving conditions from December through March during the Argentine summer. The altitude of the reservoir means that appropriate dive planning considerations for altitude diving must be followed. Located just an hour's drive from Mendoza city, Potrerillos offers an accessible diving adventure that pairs beautifully with the region's famous wine tourism, creating an experience that appeals to both the adventurous diver and the discerning traveler.