The Southern Beaches at San Gregorio State Beach is a 2.9 mile out and back trail located near Half Moon Bay, CA that features a waterfall. The trail is good for all skill levels and primarily used for hiking, walking, and sea kayaking.
San Gregorio was established to protect an estuary at the back of a wide, driftwood-strewn sandy beach. During dry seasons the estuary is landlocked but during the winter season the creek often cuts through the beach and flows directly into the ocean. The site has also been identified as a potential nesting habitat for the Western Snowy Plover. The estuary historically was a Coho Salmon spawning site which the Department of Fish and Game has considered restocking to improve the salmon fisheries on this portion of the coast. The estuary is also home to a number of bird species and small animals. There is also the remains of California Historical Landmark 26 which commemorates the 1769 passage of Spanish Explorer Captain Gaspar de Portola through this area. The beach is part of the Monterey Bay National Sea Sanctuary.