page_title: U.S. Route 101 in California
section_title: Historic route: San Diego to Los Angeles
hierarchical_section_title: U.S. Route 101 in California / History / Historic route: San Diego to Los Angeles
caption_attribution_description: English: Former alignment of US highway 101 south of Mission San Miguel, California. This former stage road was paved in 1915, and later designated US highway 101 until bypassed in 1938.
context_page_description: U.S. Route 101 is a major north–south United States Numbered Highway, stretching from Los Angeles, California to Tumwater, Washington. The California portion of US 101 is one of the last remaining and longest U.S. Routes still active in the state, and the longest highway of any kind in California. US 101 was also one of the original national routes established in 1926. Significant portions of US 101 between the Los Angeles area and the San Francisco Bay Area follow El Camino Real, the historic road connecting the former Alta California's 21 missions.
  Although the highway has been superseded in overall importance for transportation through the state by Interstate 5, US 101 continues to be the major coastal north–south route that links the Greater Los Angeles Area, the Central Coast, the San Francisco Bay Area, and the North Coast. Generally referred to as "101" by residents of Northern California, in Southern California it is often called "The 101". The highway has portions designated as the Santa Ana Freeway, the Hollywood Freeway, the Ventura Freeway, South Valley Freeway, and Bayshore Freeway, as well as El Camino Real in many non-freeway segments.
context_section_description: Instead of terminating in Los Angeles, US 101 once continued all the way south through San Diego to the United States–Mexico border in San Ysidro. However, this part was decommissioned on July 1, 1964, in favor of I-5. Though much of U.S. Route 101 has been superseded by I-5, several street segments of former Route 101 exist.
caption: Early narrow concrete pavement survives on some former alignments like this stage route near Mission San Miguel Arcángel was designated US 101 until bypassed in 1938.
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