Represa Foz do Areia, officially known as Usina Governador Bento Munhoz da Rocha Netto, is a large hydroelectric reservoir formed on the Rio Iguaçu in the state of Paraná, Brazil. The dam, owned by the utility COPEL, has a wall 828 meters long and 160 meters high, and construction began in 1975 with commercial operation starting in 1980. The reservoir covers approximately 167 km² of water surface at a maximum elevation of 774 meters above sea level, making it one of the largest impoundments in Paraná.

The reservoir sits at roughly 753 meters altitude and spans the municipalities of Pinhão, Bituruna, and Cruz Machado, approximately 280–320 kilometers from Curitiba. The standard route from Curitiba follows the BR-277 to Guarapuava (about 250 km) and then the PR-170 toward Pinhão (about 80 km), with final access via rural roads. These unpaved roads can deteriorate significantly during rainy periods, so carrying extra fuel and supplies is advisable. The reservoir is large enough that first-time visitors are encouraged to go with a local guide, as there are multiple access points spread around its perimeter.

The surrounding landscape is characterized by native forest and numerous arms and coves formed by the irregular shoreline of the impoundment. These inlets create varied paddling terrain and provide habitat for fish species including tucunaré, tilápia, and traíra. Support infrastructure around the reservoir is still developing, though accommodation options exist in nearby Pinhão. Environmental enforcement is active in the area; illegal fishing has resulted in arrests by the Polícia Militar Ambiental, indicating that regulations on the water are monitored and enforced. Paddlers should be aware of this regulatory presence and confirm any specific rules regarding watercraft use before launching.

The scale of the reservoir — over 150 km² — means that open-water crossings can expose paddlers to wind and wave conditions typical of large inland lakes. The combination of extensive shoreline, native vegetation, and the dramatic dam structure gives the water body a distinctly remote character, though the relative lack of developed facilities means self-sufficiency is important for any paddling trip here.