Nestled within the dramatic canyon of the Diamante River in Mendoza's San Rafael department, Los Reyunos is a stunning 740-hectare reservoir that ranks among the most productive and scenic fishing destinations in the Cuyo region of Argentina. Fed by the Diamante River and carved into a rugged canyon landscape, this reservoir was completed in the early 1980s and holds the distinction of being the first pumped-storage hydroelectric facility in South America. The surrounding terrain is characterized by the striking canyon walls of the Diamante, creating a visually spectacular backdrop for anglers. The reservoir's waters have proven exceptionally well-suited to both introduced salmonids and native species, making it a versatile destination for anglers pursuing a variety of targets.