Secret Beach at Samuel H. Boardman SP is a secluded paradise surrounded by breathtaking views all around. There are plenty of natural crevices to explore, massive waves at high tide to surf, and incredibly romantic around sunset.
The main parking for Secret Beach is a nondescript, unlabeled pull out on Hwy 101, between mile posts 254 and 255, as you are traveling north on the west side there will be a guardrail. Pull off the road where the guardrail ends and you can park behind it. About 6 cars can fit there. Super short and easy hike down to the beach from the parking lot. Secret Beach is made up of three beaches. The furtherest of the three beaches can only be accessed during low tide.
While you are in the area check out the Thunder Rock Cove trail loop just a bit South from Secret Beach. It's a couple of miles long and gets right up to the edge providing spectacular views.