The Santa Clarita Valley is bordered by the Lake Piru area, including the community of Val Verde, Los Padres National Forest, and Castaic Lake to the northwest, Sierra Pelona Mountains and Angeles National Forest to the north and northeast, San Gabriel Mountains to the east and southeast, and Santa Susana Mountains to the south and southwest, and Ventura County and the Santa Clara River Valley to the west. To the west-northwest lies the Topatopa Mountains.