Information: - Sweeney Ridge, is a hilly hiking area of ridges and ravines between San Bruno and Pacifica, California, about a 25-minute drive south from San Francisco. The ridges 1,200-foot-high summit, covered with coastal scrub and grassland, slopes down to San Francisco Bay on the east and to the Pacific Ocean on the west. The ridge is part of the Golden Gate National Recreation Area. Historically, the ridge is the location of the San Francisco Bay Discovery Site, commemorating the first sighting of San Francisco Bay by the Portola expedition on November 4, 1769 (expedition scouts actually made the discovery a few days earlier). - Rockaway Creek is a small creek , in the Rockaway Beach neighborhood of Pacifica , California . Located just south of Calera Creek . - The California red legged frog ("Rana draytonii") is a species of frog that is now endemic to California. It was formerly considered a subspecies of the northern red-legged frog ("Rana aurora"). The frog is an IUCN vulnerable species, and a federally listed threatened species of the United States, and is protected by law. - Pacifica is a city in San Mateo County, California, on the coast of the Pacific Ocean between San Francisco and Half Moon Bay. - San Francisco (SF) (Spanish for Saint Francis) officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. It is the birthplace of the United Nations. Located at the north end of the San Francisco Peninsula, San Francisco is about in area, making it the smallest countyand the only consolidated city-countywithin the state of California. With a density of about 18,451 people per square mile (7,124 people per km), San Francisco is the most densely settled large city (population greater than 200,000) in California and the second-most densely populated major city in the United States after New York City. San Francisco is the fourth-most populous city in California, after Los Angeles, San Diego, and San Jose, and the 13th-most populous city in the United Stateswith a census-estimated 2015 population of 864,816. The city and its surrounding areas are known as the San Francisco Bay Area, and are a part of the larger OMB-designated San Jose-San Francisco-Oakland combined statistical area, the fifth most populous in the nation with an estimated population of 8.7 million. - The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by Asia and Australia in the west and the Americas in the east. - The San Francisco garter snake ("Thamnophis sirtalis tetrataenia") is a slender multi-colored subspecies of the common garter snake. Designated as an endangered subspecies since the year 1967, it is endemic to San Mateo County and the extreme northern part of coastal Santa Cruz County in California. Some researchers estimate that there are only 1,000 to 2,000 adult snakes of the subspecies "T. s. tetrataenia" remaining. However, the full extent of the snakes' habitat has not been fully documented, and many snakes may utilize creeks and other waterways that are currently unexplored. This garter snake prefers wet and marshy areas, and because of its elusive nature, it is difficult to see or capture. - Calera Creek is a stream in the Rockaway Beach and Vallemar neighborhoods of Pacifica, California. The creek is named for the limestone deposits and historical quarry located nearby. With headwaters in the Sweeney Ridge national park, this creek presently enjoys wetlands restoration from the Calera Creek Water Recycling Plant, and contains habitat for the California Red-legged Frog and San Francisco Garter Snake. - San Mateo County (; Spanish for "Saint Matthew") is a county located in the U.S. state of California. As of the 2010 census, the population was 718,451. The county seat is Redwood City. After reading the paragraphs above, choose the best answer for the entity that related to 'rockaway creek ' with the relationship of 'instance of'. Choices: - adult - area - beach - city - combined statistical area - county - gate - large city - limestone - location - national recreation area - ocean - park - part - people - plant - population - rana - recreation - recreation area - restoration - ridge - saint - species - state - stream - summit - the city - threatened species - year
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