Devil's Slide, Coastal trail in San Mateo County, California, US

Devil's Slide is a steep, rocky coastal promontory between Pacifica and Montara in San Mateo County, California. A two-lane paved road, the former State Route 1, runs along the slope above the ocean, cut into the hillside and passing through a notch between rock outcrops. Above the road, a concrete bunker with a curved projecting wall and a rectangular opening sits directly on the yellow and orange rock face.

California State Route 1 passed through this area from 1936 until 2013, when repeated landslides forced its closure. Engineers then built tunnel bypasses to redirect traffic while transforming the old route into a hiking trail.

The site once served as a military lookout during World War II, where soldiers watched ships moving through the Pacific below. Visitors walking here today can sense that wartime connection while enjoying the ocean views from the same vantage point.

The trail is paved and suitable for both walkers and cyclists, with parking available at both ends of the route. Wear sturdy shoes and expect windy conditions, as the clifftop location offers little shelter from ocean breezes.

In 1960, Universal crews filmed a scene for Portrait in Black here, in which Lana Turner and Anthony Quinn push a car holding a murdered man's body over the cliff; the car was later hauled up from the bottom. The San Mateo Times printed a photograph of the filming.