Hanging bunker (Devil's slide)

Hanging bunker at Devil's slide is an abandoned military triangulation station and observation site used during World War II as part of the harbour defence of San Francisco.

Prior to the advent of radar in 1932, military personnel would use binoculars and compasses to search for ships at sea and relay their coordinates to a central post. By combining information from multiple observation posts, a ship's precise location could be determined by triangulation.

There were six military structures at the Devil's Slide: three concrete and steel observation pill-boxes, two concrete and earth bunkers, and a reinforced steel observation tower. The pill-boxes were used as hardened observation posts, and one of the bunkers was used as a communications and command post.

The site was sold to a private owner in 1983, but some of the structures remain.

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Judy M
6 August 2015
It is a very family friendly paved trail, a little over one mile. Separate lanes for bikes and pedestrians. Restrooms at each end of the trails as well as small parking lots.
The Ritz-Carlton
20 November 2014
Converted from a former segment of Highway 1, this trail gives hikers a fun way to explore the area with observation scopes and cliff side overlooks.
Gregory Trevor Rice
12 November 2015
Add a little distance and venture off-pavement at the Pedro Point Headlands. Connection at the north parking lot entrance.
Nico Pitney
28 March 2023
San Pedro Beach to Devil's Slide & back (or park two cars). World's most scenic Taco Bell waiting on your return https://www.alltrails.com/explore/trail/us/california/san-pedro-beach-to-devil-s-slide
Cody Tolmasoff
30 March 2014
Park at the southern end if possible so you do the uphill section first, and downhill on the way back to the car.
Gyozo Nagy
31 March 2016
Nice trail to walk, free parking and restrooms. Be ready for climb ;)
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5929-5981 Old Pacific Coast Highway Trail, Half Moon Bay, CA 94019, USA Get directions
Mon-Sun 8:00 AM–8:00 PM

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