![]() The freeway is connected to several of the valley's main cities, including Fresno, Merced, and Modesto, by other highways. Now named the West Side Freeway, I-5 travels northwest along the edge of the Central Valley through farmland and avoids populated areas. At Wheeler Ridge near the south end of the valley, State Route 99 splits from the freeway to serve Bakersfield and other major cities in the Central Valley, while I-5 stays to the west. The freeway then traverses the narrow Grapevine Canyon and descends for 12 miles (19 km) into the San Joaquin Valley. After passing Pyramid Lake, I-5 makes several turns as it follows a series of narrow valleys to reach the second-highest point of its entire length, Tejon Pass (elevation 4,144 ft or 1,263 m) in the Tehachapi Mountains. The northbound ascent includes a continuous 5 percent grade for 5 miles (8.0 km). The freeway passes the city of Santa Clarita and ascends into the Sierra Pelona Mountains, where the northbound and southbound lanes separate and cross sides for approximately 5 miles (8.0 km). I-5 then leaves the river and travels across the San Fernando Valley, later crossing the Newhall Pass through the Santa Susana Mountains to reach the Santa Clarita Valley the Newhall Pass interchange with State Route 14 is notable for having separate lanes for truck traffic. The freeway splits from I-10 and turns northwest to follow the Los Angeles River through Glendale and into Burbank. Īt the East Los Angeles Interchange near Downtown Los Angeles, I-5 intersects US 101 and begins a short concurrency with I-10 on a section of the Golden State Freeway. Southern Californians often refer to I-5 as "the 5" or as the Santa Ana Freeway in the Los Angeles area. The freeway intersects I-605 in Downey and I-710 in Commerce before reaching the city of Los Angeles. I-5 continues northwest as the Santa Ana Freeway through several Orange County and Los Angeles County suburbs and passes near Disneyland in Anaheim. At Dana Point, I-5 turns inland and heads north through Mission Viejo to the El Toro Y interchange in Irvine, where I-405 splits and carries the San Diego Freeway designation. Between Oceanside and San Clemente, an 18-mile (29 km) stretch of the San Diego Freeway passes through Marine Corps Base Camp Pendleton before entering Orange County. I-5 bisects the University of California, San Diego campus, merging with I-805 nearby, and follows the Pacific coastline through the northern suburbs of San Diego. The freeway then travels around Downtown San Diego and San Diego International Airport before reaching a junction with I-8. I-5 follows the shore of San Diego Bay and intersects State Route 15 (a continuation of I-15) near Naval Station San Diego. Montgomery Freeway and I-805 serving the eastern neighborhoods. The freeway splits in San Diego's San Ysidro neighborhood, with I-5 traveling northwest through Chula Vista and National City on the John J. The southern terminus of I-5 is at the Mexican border at the San Ysidro Port of Entry, the busiest land border crossing in the Western Hemisphere the crossing handles a daily average of 70,000 vehicles and 20,000 pedestrians crossing northbound and connects with Mexican Federal Highway 1 in Tijuana. The freeway was built in segments between 19, including expressway sections of US 99 that were built earlier to bypass various towns along the route. I-5 largely follows the route of US 99, with the exception of portions south of Los Angeles and in the Central Valley of California. The Pacific Highway was built in the 1910s and 1920s by the states of California, Oregon, and Washington, and was later incorporated into U.S. I-5 was originally created in 1956 as part of the Interstate Highway System, but it was predated by several auto trails and highways built in the early 20th century. ![]() Upon crossing the Canadian border at its northern terminus, it continues to Vancouver as British Columbia Highway 99 (BC 99). ![]() Upon crossing the Mexican border at its southern terminus, I-5 continues to Tijuana, Baja California, as Mexican Federal Highway 1 (Fed. 1). It is the only continuous Interstate highway to touch both the Mexican and Canadian borders. It travels through the states of California, Oregon, and Washington, serving several large cities on the West Coast, including San Diego, Los Angeles, Sacramento, Portland, and Seattle. Interstate 5 ( I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific Coast of the contiguous U.S. Hwy 99 at the Canadian border at Blaine, WA Fed. 1 at the Mexican border at San Diego, CA ![]()
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