Represa De Ilha Solteira is a massive reservoir formed by the Ilha Solteira hydroelectric dam on the Paraná River, sitting on the border between São Paulo state and Mato Grosso do Sul in Brazil's western interior. This impressive impoundment is one of the defining features of the region, transforming what was once a powerful lotic river system into a vast lentic environment that now supports a rich and diverse fish community. The reservoir draws anglers from across Brazil and beyond, offering a true paradise for fishing enthusiasts alongside well-maintained river beaches, promenades, and recreational amenities. The city of Ilha Solteira itself is a planned urban center that provides a comfortable base for visiting anglers, with easy road access from neighboring regions and the state of Mato Grosso do Sul.