Barragem De Curuá-Una is a reservoir created by a hydroelectric dam on the Curuá-Una River in the state of Pará, Brazil. The dam was constructed in 1977, forming a significant artificial lake. The reservoir is situated in the Amazon region, within the Tapajós-Xingu moist forest ecoregion. Accessing the area requires planning, as it is somewhat remote; common advice is to arrange local transport or guided tours from the nearby city of Santarém. The reservoir's creation has had documented environmental impacts on the local aquatic ecosystem over its decades of operation. For paddlers, the water body presents a large, open expanse typical of a dammed river. The Curuá-Una River itself, which feeds the reservoir, is approximately 93 kilometers long and is a right-bank tributary of the Amazon River. Downstream from the dam, the river continues for several kilometers, offering a different paddling environment from the reservoir. Specific details regarding formal public access points, designated take-outs, seasonal water temperature patterns, water quality, or any paddling-specific regulations are not detailed. The area is of interest for its Amazonian setting, and the reservoir has been a subject of scientific study regarding longitudinal gradients from the river inflow to the dam structure, which influences fish populations and ecological conditions.