The Channel Islands were originally discovered in 1542 by the explorer Juan Rodríguez Cabrillo. In 1938 the Santa Barbara and Anacapa islands were designated a national monument. San Miguel, Santa Rosaand Santa Cruz islands were combined with the monument in 1980 to form modern-day Channel Islands National Park.
Channel Islands National Park consists of five of the eight Channel Islands off the coast of the U.S. state of California, in the Pacific Ocean. Although the islands are close to the shore of densely populated Southern California, their isolation has left them relatively undeveloped.
Channel Islands National Park is home to a wide variety of significant natural and cultural resources. It was designated a U.S. National Monument on April 26, 1938, and a National Biosphere Reserve in 1976. It was promoted to a National Park on March 5, 1980. Channel Islands National Marine Sanctuary encompasses the waters six nautical miles around Channel Islands National Park.