Arroyo Uruguay o Grande is a stream winding through the lush subtropical landscape of Misiones Province in northeastern Argentina. Situated at approximately 26°07′S, 53°55′W, this waterway flows through one of South America's most biodiverse regions, where dense Atlantic Forest vegetation lines the banks and the warm, tannic waters support a rich assemblage of native fish species. The stream is best known among local and visiting anglers for its population of Golden dorado, one of the most prized and hard-fighting freshwater sport fish in South America, making it a compelling destination for anglers seeking an authentic Misiones fishing experience.