North Spit, Humboldt Bay
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Humboldt Bay, 21 miles N of Cape Mendocino Light, is the first important harbor N of San Francisco and is used by vessels drawing up to 38 feet. Humboldt Bay is the second largest natural bay on the coast of California and as such contains many environmentally and economically important wetland habitats. In addition to being a nursery area for many species of commercially and recreationally important fish and invertebrates, Humboldt Bay also produces more than 50 percent of the oysters harvested in California.