Bean Hollow State Beach covers a one-mile stretch of the San Mateo coast south of Pescadero. California State Parks says it has two parking lots. Pebble Beach is named for the rounded, ocean-polished rocks on its shore. Bean Hollow Beach is a small sandy cove flanked by rocky tide pools.
The trail
The one-mile Arroyo de los Frijoles Trail connects the two beaches, and interpretive panels along it make for a self-guided tour. Wikipedia says the trail passes ice plant, lizard's tail, coyote bush, blackberry and wildflowers, and the orange sandstone bluffs show honeycomb-like tafoni weathering.
Pebbles stay put
State Parks is blunt: collecting of any kind, including pebbles, is prohibited. Wikipedia says the Pebble Beach stones come from an offshore gravel bed dating to the Pleistocene and include moonstone, jade, chert, agate and jasper. In the tide pools, visitors can see anemones, crabs and sea urchins, but State Parks asks people to look without touching or disturbing them.
Visiting
State Parks says the Pebble Beach lot is half a mile south of Pescadero and has chemical toilets and stairs down to the beach. The Bean Hollow lot, a mile south of Pescadero, is small and has picnic tables and chemical toilets. Wikipedia's figures put the beach 3 miles south of Pescadero and 17.5 miles south of Half Moon Bay. There's no drinking water and no camping. Dogs are allowed on a leash no longer than six feet, while fires, fireworks and drones are banned.
State Parks warns that swimming is dangerous because of cold water, rip currents and heavy surf. Wikipedia adds sharks to the list.
History
Wikipedia says the name comes from Cañada del Frijol, used in the 1840s. The Portolá Expedition camped nearby in November 1769 on its way back to San Diego. The surrounding territory belonged to the Quiroste, and research suggests they lived there for at least a thousand years. The state acquired the 44-acre property in 1958.
Just up the road: Pigeon Point Lighthouse and Pescadero State Beach.