Flowing through the municipality of Alcobaça, the Alcoa River reaches the Atlantic Ocean near the coastal town of Nazaré. The river is known for its course that changes name to Alcobaça after joining with its tributary, the Baça. The surrounding landscape features a mix of natural vegetation and cultivated land, reflecting the region's agricultural heritage.
Along the riverbanks near Nazaré, the Alcoa contributes to the area's ecosystem and local water supply. The river's proximity to the ocean creates a transition zone where freshwater meets saltwater, influencing the local flora and fauna. This setting provides insight into the hydrological and environmental characteristics of the region.
