Ksar el-Kebir, also known as al-Qasr al-Kabir, is a city in northwestern Morocco, about 160 km north of Rabat, 32 km east of Larache and 110 km south of Tangier. It recorded a population of 126,617 in the 2014 Moroccan census.

The Loukkos River is a major river in northern Morocco. Although it is relatively short, the river is the third largest in Morocco with an average flow of 50 m³/s. The Loukkos river's source is located in the Rif Mountains and flows into the Atlantic Ocean in the city of Larache; the city's port is on the river. The Loukkos river basin is 3,730 km2 and contains one of the most fertile and productive agricultural lands in the country. One of the river's tributaries, Oued Makhazine, bears great historical importance since it witnessed one of the most decisive battles in the history of Morocco: the Battle of Alcácer Quibir. In the battle on 4 August 1578, the joint army of deposed Moroccan monarch Abu Abdallah Mohammed II Saadi and his ally, King Sebastian of Portugal, was defeated by the army of the new Moroccan sultan from the same Saadi dynasty.