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 Creek (San Gabriel River tributary) Pomona into the San Gabriel River through the Pomona Valley and San Gabriel Valley. From 1829, San Jose Creek was a stopping place on the Old Spanish Trail first used by Antonio Armijo. In 1837, much of its upper reaches were enclosed within the Rancho San Jose. San Jose Creek (San Gabriel River tributary) San Jose Creek is an intermittent, tributary stream of the San Gabriel River in Los Angeles County, California. The mouth of San Jose Creek is at an elevation of 194 feet / 59 meters at its confluence with the San Gabriel River, 3.5 miles, (5.6 km)