Blida , capital of Wilaya , is located 50 km West of Algiers, on the southern edge of the plain Mitidja 22 km from the sea. It is in a situation contact between the mountain and the plain. the cone dejection of the Oued El Kebir Sidi way to a altitude of 270 m. The territory of the municipality extends over an area of ​​7.208 ha. The greenfield site has four parts distinct : The first two present the entire foothills which is bounded on the side South by the mountain , they gathered at level of Sidi El Kebir valley. The part West is bounded by the Oued El Kebir Sidi North side , it is powered by numerous ravines .