Estero Bluffs State Park, Coastal state park in San Luis Obispo County, United States.

Estero Bluffs is a 353-acre coastal park stretching from the highway to the Pacific Ocean, dominated by grassland and marine terraces with a diverse landscape. The property includes wetlands and low bluffs that form the main features along the shoreline.

The property was purchased by the Trust for Public Land in 2000 and transferred to California State Parks two years later for permanent protection. A conservation agreement has ensured the land remains undeveloped since that handover.

The name 'estero' comes from Spanish, referring to a salt marsh, reflecting the area's deep connection to coastal waters and tidal lands. The grasslands and wetlands here served as hunting and living grounds for indigenous peoples for thousands of years, with their presence still evident in the landscape today.

Access is from pull-offs along California State Route 1, which runs within about 300 yards of the shoreline; there are no developed facilities, and a conservation easement prohibits restrooms and running water. Paths are informal routes over grassland and along low bluff edges above the intertidal rocks. Villa Creek forms a pocket cove and beach that can be reached on foot.

The park contains rare rock formations from the Franciscan Assemblage dating back to the Jurassic Period, lifted to their current height by tectonic forces over millions of years. These geological structures form the visible cliffs and reveal the dynamic earth history of this coastal region.