http://www2.census.gov/geo/maps/dc10map/GUBlock/st06_ca/cousub/cs0608591680_llagas-uvas/DC10BLK_CS0608591680_000.pdf 2010 US Census map for tract 5122, Llagas-Uvas CCD 91680] The area covers approximately 102 sqmi , much of it open space, Open Space Authority of Santa Clara County and contains the Uvas and Chesbro reservoirs, as well as the Calero, Uvas Canyon, Rancho Cañada del Oro, Rancho Cañada del Oro County Park and Mount Madonna county parks.