Searsville Dam is a masonry dam in San Mateo County, California that was completed in 1892, one year after the founding of Stanford University, and impounds Corte Madera Creek (in the San Francisquito Creek watershed) to form a reservoir known as Searsville Lake. Searsville Dam is located in the Jasper Ridge Biological Preserve and is owned and operated by Stanford University. Neighboring cities include Woodside and Portola Valley, California.