Senate District 25 is made up of diverse communities and the rich natural beauty of the San Gabriel Mountains. The district includes the cities of Alhambra, Arcadia, Claremont, Glendale, Glendora, La Canada Flintridge, Monrovia, Monterey Park, Pasadena, Rosemead, San Gabriel, San Marino, Sierra Madre, South Pasadena, Temple City, Rancho Cucamonga and Upland.