Muir Beach Overlook, Coastal viewpoint in Marin County, United States.

Muir Beach Overlook is a cliffside viewpoint on Highway One in the Golden Gate National Recreation Area, 0.5 miles (0.8 km) north of Muir Beach in Marin County, California. From the overlook, visitors look out over Pacific oceanside cliffs, and on clear days San Francisco is visible across the water. The site also holds several historic base-end stations, concrete observation posts that remain at the overlook.

Muir Beach Overlook holds several historic base-end stations, where soldiers triangulated the distance, speed and direction of ships together with other stations. The stations served artillery units and gained particular importance during World War II after the bombing of Pearl Harbor, when many in California feared San Francisco or Los Angeles would be the next target. They became obsolete with the spread of radar.

The overlook is named after John Muir, the naturalist who founded the Sierra Club and lived in nearby Martinez. Visitors today walk the short path to the cliff edge and look down on the base-end stations, concrete observation posts from the World War II coastal defense network that remain open to enter.

A parking area with restroom facilities and picnic tables sits at the trailhead, from which a short walk of about 200 yards leads to the main viewing platform. Clear days offer the best conditions for visiting, as visibility stretches far across the water and rock formations stand out clearly.

The overlook's historic base-end stations were built for coastal artillery: soldiers there triangulated the distance, speed and direction of ships together with other stations. Radar made them obsolete, but several remain and can still be entered.