http://www2.census.gov/geo/maps/dc10map/GUBlock/st06_ca/cousub/cs0608593660_west_santa_clara/DC10BLK_CS0608593660_000.pdf US Census 2010 map for tract 5117, West Santa Clara CCD 93660] The area covers approximately 50 sqmi , much of it open space, Open Space Authority of Santa Clara County and contains Boronda Lake, Felt Lake, and Lake Ranch reservoirs, as well as Sanborn Santa Clara County Parks: Sanborn and Stevens Creek Santa Clara County Parks: Stevens Creek county parks.