The SS Palo Alto is a rare 'cement ship' built using concrete due to steel shortages during the First World War.
The ship was originally intended to be a luxury excursion boat with a ballroom and swimming pool before it became a stationary pier.
The hull of the SS Palo Alto was significantly broken apart by winter storms, leaving only the lower sections visible at low tide.
The beach is a known location for finding fossilized remains, particularly shark teeth, which erode from the nearby cliffs.
Rio Del Mar is technically a continuation of the state-managed Seacliff State Beach, forming a contiguous recreational zone.
The area is prone to significant coastal erosion, leading to periodic cliff stabilization projects near the homes overlooking the sand.
Rio Del Mar Beach is a prominent stretch of coastline in Aptos, California, situated along the northern shores of Monterey Bay. The beach is defined by the prominent remains of the SS Palo Alto, a concrete ship built for World War I that was grounded here in 1929 to serve as an amusement pier. The beach features a paved esplanade that runs parallel to the shoreline, providing accessible pathways for pedestrians and cyclists. It is part of the larger Seacliff State Beach complex, managed by California State Parks. The coastal environment is characterized by high bluffs and a wide, sandy beach suitable for swimming, sunbathing, and beachcombing. Strong rip currents are a consistent feature of this section of the Pacific coast, requiring caution for swimmers.
From the beach level looking toward the SS Palo Alto at low tide during sunset.
Check the tide charts before visiting, as high tide significantly reduces the available dry sand area.
Pack layers, as the marine layer frequently brings cool, foggy conditions even during summer months.
Bring water shoes if exploring near the SS Palo Alto remnants, as the submerged concrete and rebar can be sharp.
Attempting to swim or surf directly next to the metal and concrete debris of the SS Palo Alto.
Dogs must be kept on a leash at all times; do not climb on the ship wreckage for safety and structural preservation reasons.
