Bowling Ball Beach is located at the northern end of Schooner Gulch State Beach. If the tide rises, it’s hard not to notice the large round rocks that resemble bowling balls as you walk along the beach.
Best observed at low tide, the so-called bowling balls are actually a geological phenomenon known as “concretion,” sedimentary rock formed by a natural process wherein mineral cement binds grains of sand or stone into larger formations. These boulders are the result of millions of years of concretion and erosion, exposing the hard spheres as the mudstone of the cliffs receded around them.
Almost perfectly spherical about two or three feet in diameter, stones like these have caused wild speculation wherever they’ve been discovered, with answers from aliens to dinosaurs, but the answer is actually simple geology.
Although rare, this same phenomenon is what created the extraordinary Moeraki Boulders and Koutu Boulders in New Zealand, Cannonball River in North Dakota, Valley of Balls in Kazakhstan, as well as elsewhere in the world.
At the far north end of Bowling Ball Beach, there’s a surfing area known as Whiskey Shoals (near the mouth of Ross Creek) which is more accessible for surfers from the Moat Creek Public Access.
According to the Internet