Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. State Route 76 (SR 76) is a 52.32-mile (84.20 km) state highway in the U.S. state of California. It is an important east west route in the North County region of San Diego County that begins in Oceanside near Interstate 5 and continues east past Interstate 15 to State Route 79. The section of the highway through Oceanside is an expressway; east of Oceanside, SR 76 is a two-lane highway, although there are plans for the expansion of much of the route.