East San Jose 1911. The 1910 US Census recorded a population of 1,661. Before World War II, East San Jose was a small section of San Jose located on the east banks of the Guadalupe River and west of today's U.S. Route 101. After World War II, the area saw rapid development, along with much of the Santa Clara Valley. East San Jose East San Jose (or East Valley or The Eastside) is the eastern San Jose, California in Silicon Valley, comprising several neighborhoods and including a former city of that name. The area is bounded roughly by Berryessa Rd to the north,
San Jose, California (which separate the South Bay from the Pacific Coast) flowing north through San Jose, ending in the San Francisco Bay at Alviso. Along the southern part of the river is the neighborhood of Almaden Valley, originally named for the mercury mines which produced mercury needed for gold extraction from quartz during the California Gold Rush as well as mercury fulminate blasting caps and detonators for the U.S. military from 1870 to 1945. East of the Guadalupe River, Coyote Creek also flows to south San Francisco Bay and originates on Mount Sizer near Henry W. Coe State Park and the surrounding