Sepulveda Boulevard, Los Angeles

Why you should experience Sepulveda Boulevard in Los Angeles, California.

Sepulveda Boulevard is a commanding corridor where Sherman Oaks's Valley character meets the Santa Monica Mountains, a historic passage through Sepulveda Pass and one of Los Angeles's rare surface streets connecting the basin with the San Fernando Valley.

Running through Sherman Oaks between the Central San Fernando Valley and West Los Angeles, the mountain corridor follows a long north-south line from the broad Valley floor toward Ventura Boulevard before climbing through Sepulveda Pass and descending into the Westside. Northern stretches cross an expansive urban grid of apartment districts, commercial blocks and detached houses, with the Santa Monica Mountains steadily enlarging at the southern horizon. The boulevard contracts dramatically beyond Ventura Boulevard as steep chaparral-covered slopes replace the Valley grid and long curves negotiate a natural opening through the range beside Interstate 405. Crossing the crest reveals the Los Angeles Basin through a descending sequence of canyon walls and increasingly dense Westside development, giving the roadway a geographic reach far beyond the individual neighborhoods along it. The result is a corridor whose immense Valley sightlines, mountain ascent, confined pass and descent toward the coastal plain make one of Los Angeles's fundamental topographic divisions unusually tangible.

What you should know about Sepulveda Boulevard.

Sepulveda Boulevard is best known for transforming an ancient passage across the Santa Monica Mountains into the principal automobile connection between the San Fernando Valley and West Los Angeles before construction of Interstate 405. The Portolá expedition crossed the mountains through Sepulveda Pass on August 5, 1769 after coastal cliffs farther west proved unsuitable for its horses and mules, following a route near the alignment later occupied by the boulevard. Los Angeles began applying the Sepulveda name to portions of the roadway in 1925, honoring Francisco Sepulveda, whose family had become prominent landholders in nineteenth-century Southern California; the Valley section had previously been known as Saugus Avenue. Highway development intensified when work began in 1922 on converting the older mountain route into a major automobile connection. Engineers bored a 665-foot tunnel through sandstone at the pass in 1930, then completed the 7.6-mile roadway between Ventura Boulevard and Sunset Boulevard in 1935. The paved mountain section cost $300,000 from state gasoline-tax revenue and gave Valley motorists a direct outlet across the range at a time when Cahuenga Pass and Laurel Canyon carried much of the existing traffic. Four-lane Sepulveda Boulevard rapidly became one of the region's principal automobile passages, embedding the street within the geography of metropolitan expansion as the Valley and Westside developed on opposite sides of the mountains.

Traffic growth eventually overwhelmed the mountain highway that had been engineered to solve an earlier transportation problem. By the 1950s, more than 40,000 vehicles a day were squeezing through the three-lane tunnel at the crest, and crashes on the curving road killed 65 people during that decade. California began constructing the San Diego Freeway through the pass in August 1960 as part of a 12-mile, $20 million undertaking, then the most expensive highway project in the state. Interstate 405 assumed the boulevard's long-distance role, running beside it through the mountains and leaving the older road as a surface alternative connecting Sherman Oaks with the Westside. Sepulveda simultaneously retained an extraordinary metropolitan reach beyond the pass: by the early twenty-first century the street extended 40 miles from Mission Hills toward Long Beach, making it the longest city street in Los Angeles. Its southern course acquired another major engineering work in 1953, when a 1,909-foot, six-lane tunnel restored the boulevard beneath newly extended runways at Los Angeles International Airport. The boulevard consequently carries successive generations of Los Angeles transportation engineering, from an early mountain road through prewar highway construction, postwar freeway replacement and the specialized infrastructure required by the expansion of a major international airport.

How to fold Sepulveda Boulevard into your trip.

Sepulveda Boulevard works as the anchor for an outing connecting a grand flood-control landscape, a Japanese garden conceived around reclaimed water and a major Jewish cultural institution designed into the Santa Monica Mountains.

Begin at Sepulveda Dam, constructed after catastrophic Los Angeles flooding demonstrated the need for a coordinated regional flood-control system. The U.S. Army Corps of Engineers completed the structure on December 30, 1941 at the Los Angeles River, creating the westernmost Corps project within the Los Angeles County Drainage Area system. The surrounding project encompasses 2,131 acres, with the dam designed to capture runoff from uncontrolled upstream drainage, hold floodwater temporarily and release it at a rate compatible with the downstream river channel. Its immense basin subsequently accumulated environmental and recreational uses around infrastructure whose fundamental purpose remains protection of the Valley and downstream communities. Continue to The Japanese Garden, where former Los Angeles city engineer Donald C. Tillman proposed using a highly controlled landscape to demonstrate the potential of reclaimed water beside the municipal treatment plant that later bore his name. Koichi Kawana designed the 6.5-acre Suihō-en as three connected garden environments, beginning with a dry Zen meditation garden before developing into lakes, streams and waterfalls and concluding around a Shoin building and tea garden. Kawana integrated the composition with the adjoining architecture and conceived its water-intensive landscape as a demonstration that reclaimed water could support a demanding horticultural environment. Conclude at Skirball Cultural Center, whose origins reach to Uri D. Herscher's early-1980s campaign for a major Jewish cultural institution in Los Angeles. Jack and Audrey Skirball provided initial funding in 1983, Herscher selected a 15-acre site in the Santa Monica Mountains and Moshe Safdie designed all four construction phases of the campus, his first cultural project in the United States. The institution opened in April 1996 and incorporated a museum collection whose institutional ancestry extends to Hebrew Union College's Union Museum, founded in Cincinnati in 1913; the collection moved to Los Angeles in 1972 and now encompasses 30,000 objects spanning Jewish art, ceremonial objects, archaeology, books and American Jewish cultural history. The progression moves from federal engineering devised to control the Los Angeles River through Kawana and Tillman's conversion of reclaimed water into landscape architecture and culminates in Safdie and Herscher's mountainside cultural campus, tracing three large-scale interventions that reshaped the natural and institutional geography surrounding Sepulveda Boulevard.

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