The Golden Gate Bridge is a suspension bridge that crosses over the San Francisco Bay, going from San Francisco to Marin County, in the U.S. state of California. It was opened for use in 1937. When the bridge was finished, its length of 9,266 ft (2824 m) made it the longest bridge in the world until 1964. It carries U.S. Route 101 and California State Route 1. There is also a footpath for people and bicycles.