Sierra Point is a small artificial peninsula that extends eastward into the San Francisco Bay from the eastern shore of the San Francisco Peninsula, located in Brisbane, San Mateo County, California (although the south part of the business park extends into South San Francisco). It lies entirely east of U.S. Route 101. There are several class A office buildings at Sierra Point including the Dakin Building and the former Hitachi building. The Brisbane Marina is on the eastern shore of Sierra Point. The San Francisco Bay Trail runs along the waterfront of the peninsula and continues south into the Oyster Point area of South San Francisco.