page_title: Devil's Slide (California)
section_title: Former State Route 1
hierarchical_section_title: Devil's Slide (California) / Former State Route 1
caption_attribution_description: The road along the coast south from San Francisco passes along beaches as well as along steep cliffs. At one such spot it traditionaly fails every winter, and part of the road falls into the ocean, the road is closed, and what for some people used to be a 15 minute drive turns into an hour's detour to get to work. Repairs can take anywhere from 6 weeks (good) to most of a year (bad)
context_page_description: Devil's Slide is a coastal promontory in California, United States. It lies on the San Mateo County coast between Pacifica and Montara. Its name comes from the rocky edges prone to accident.
context_section_description: Immediately east of Devil's Slide is a former stretch of California State Route 1, famous for closures and landslides, which also was called "Devil's Slide". Construction of the road began in 1935 and was completed in 1936, replacing the steep, narrow, and winding Pedro Mountain Road. It was known for landslides and erosion that often occur during winter storms, sometimes making the road impassable.
  The first major landslide destroyed much of the road in 1940. Another large slide in 1995 forced the road's closure for almost two years. Most recently, in April 2006, the road began to develop large longitudinal cracks in the roadbed, indicating an imminent slide and forcing the highway's closure for five months as CalTrans worked to stabilize the slide. It was this closure that encouraged locals to lobby for an alternate route through the mountainside via a pair of tunnels that would completely bypass Devil's Slide.
  On March 25, 2013, Caltrans shut down the landslide-prone coastal road, replacing it with the Tom Lantos Tunnels, which take the highway through the promontory behind the precarious cliffs. On March 27, 2014 the 1.3-mile (2.1 km)-long Devil's Slide Trail was opened to pedestrians and bicyclists, taking over the section of roadway formerly used by State Route 1 and now bypassed by the new tunnels. The total cost to convert the highway to a trail was US$1,991,525 (equivalent to $2,186,000 in 2019).
caption: Devil's Slide (far left) with the southern portal of the Tom Lantos Tunnels (far right) under construction in late 2010. Note the steeply eroded cliffs immediately above and below Highway 1.
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