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Golden Gate Bridge Twilight Fog, Marin Headlands, California
Photo ID# RW3100
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During the summer months, San Francisco is often covered by a low layer of fog in early morning and late afternoon. This effect is caused by the cold air coming in from the Pacific Ocean colliding with the hot air from the Central Valley which results in consensation along the coast. Often times, the fog hovers and stops around the Golden Gate Bridge.