Cerro del Tezoyoc, Tepemapa, Santa Bárbara, Cerro del Texquistle, and Cerro Partido. Mountainous areas cover approximately 7.41% of the surface; the semi-flat areas 74.62%; plants cover 17.95%. The mountainous zones are mainly in the north and northeast of the municipality, although the south is also somewhat hilly. The foothills of the Sierra Chichinautzin and the Ajusco are semi-plains, whereas the center and south of the municipality have valleys and plains. There are sand mines in Colonias (neighborhoods) Lomas de Carril and Alta Palmira.