The largest coastal gap is the Golden Gate at the entrance to San Francisco Bay which also communicates via the Bay with the Carquinez Strait and the Central Valley. As the city of San Francisco lies adjacent to the Golden Gate, it is often subject to the fog and low clouds blowing in on the marine layer.
The largest coastal opening is the Golden Gate at the entrance to San Francisco Bay, which also connects with the Carquinez Strait and the Central Valley. Since the city of San Francisco is adjacent to the Golden Gate, it is often shrouded in fog and low clouds that blow in from the marine layer.