Oyster Bay Regional Shoreline, Regional park in San Leandro, United States.

Oyster Bay Regional Shoreline is a park on the eastern shore of San Francisco Bay in San Leandro, built on a former landfill capped with clay. Its main entrance is at the end of Neptune Boulevard, and a second entrance on Davis Street was under construction in 2014. Seven non-reservable picnic areas line the multipurpose interior trails, which lead to a viewing site marked by a sculpture called "Rising Wave."

The site served as a landfill for 37 years and was filled to capacity in 1977, when it was capped with a clay cover. The East Bay Regional Park District bought the property in 1980 with the aim of turning it into a park. Clean soil was later imported to meet cap and drainage requirements, and in December 2013 the district approved a land-use plan for trails, parking, disc golf and a dog area.

The park's name comes from the oyster beds once harvested in these bay waters. Visitors today use seven non-reservable picnic areas along the interior trails, and a sculpture called "Rising Wave" marks a viewing site near the middle of the park. The paved San Francisco Bay Trail runs 2 miles from the Neptune Drive entrance to the Bill Lockyer bridge.

The main entrance is at the end of Neptune Boulevard, off Marina Boulevard; a second entrance on Davis Street was under construction as of 2014. Dogs must be leashed on paved trails, including the San Francisco Bay Trail and the nature walk, while unleashed dogs may use only unimproved, unpaved trails. The 4.6-mile Oyster Bay Regional Shoreline Loop has a water fountain accessible to dogs.

The park's highest point is marked by a sculpture called "Rising Wave", reached by the interior trails from the picnic areas. The 18-hole disc golf course has two tee pads and two baskets per hole, plus an alternate base so baskets can be moved, and looks out over San Francisco Bay toward the city of San Francisco.