Located almost half way to Santa Cruz south of San Francisco on Highway 1, Pescadero Marsh is a key rest stop along Pacific Flyway for thousands of migratory birds every year. The marsh is fed by two creeks, one of which flows 26miles all year long from a spring in Castle Rock State Park (1800 ft), and another which drains the Santa Cruz Mountains.
From the parking lot on the west side of Highway 1 take the trail north along the side of the highway to the beach. At the beach, make a u-turn left and walk under the bridge to the marsh trails. Go on a weekday if you can.
Ocean view from the parking lot:
I did not take this trail:
I turned left.