The Sorraia river is about 60 km long and calmly crosses the parish, later joining the Tagus river on the Vila Franca de Xira lezíria ( a kind of plain). It is the larges and most important tributary of the Tagus and marks the border between the Ribatejo and the Alentejo. Because it has almost no current and a depth of only 1.70 metres, it is quite attended by fishers of which there are several championships here.