Morro Bay is a waterfront city in San Luis Obispo County, California.
The town’s most striking feature is Morro Rock, a 576 foot high volcanic plug which stands at the entrance to the harbor. Originally it was surrounded by water, but the northern channel was filled in to make the harbor. It was quarried from 1889 to 1969, and in 1968, it was designated a Historical Landmark.
Morro Bay Harbor
Morro Bay is a natural embayment with an artificial harbor constructed by the U.S. Army Corps of Engineers. It is the only all-weather small craft commercial and recreational harbor between Santa Barbara and Monterey. Morro Rock was originally surrounded by water, but the Army built a large artificial breakwater and road across the north end of the harbor, linking Morro Rock and the mainland. Some of the rock used for this and for the artificial breakwaters was quarried from Morro Rock itself. Other rock was imported by barge from Catalina Island. The bay extends inland and parallels the shore for a distance of about 6.4 km (4 miles) south of its entrance at Morro Rock. Morro Bay is recognized for protection by the California Bays and Estuaries Policy.