Interstate 15 in California
Route 15, consisting of the contiguous segments of State Route 15 (SR 15) and Interstate 15 (I-15), is a major north–south state highway and Interstate Highway in the U.S. state of California, connecting San Bernardino, Riverside, and San Diego Counties. The route consists of the southernmost 289.24 miles (465.49 km) of I-15, which extends north through Nevada, Arizona, Utah, Idaho, and Montana to the Canada–US border. It is a major thoroughfare for traffic between San Diego and the Inland Empire, as well as between Southern California, Las Vegas, Nevada, and the Intermountain West.
Looking south from the University Avenue overpass in San Diego
I-15 southbound entering the Temecula Valley in Murrieta
I-10/I-15 interchange in Ontario
West of Baker, the freeway jogs north to pass Cave Mountain
San Bernardino County, California
San Bernardino County, officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181,654, making it the fifth-most populous county in California and the 14th-most populous in the United States. The county seat is San Bernardino.
Image: San Bernardino County Courthouse 2
Image: Downtown San Bernardino
Image: Calico view from lookout point
Image: San Gorgonio Wilderness Dry Lake