Morro Rock in an ancient volcano and main landmark of Morro Bay at 581 feet. This monolith is protected as Morro Rock State Preserve which includes the surrounding stretch of coast as a beach. It is the first of San Luis Obispo's 'Nine Sisters' or volcano plugs created 20 million years ago. Native Chumash and Salinan consider it sacred and archeological evidence has found settlements near the site dating 6500-2000 B.C. Morro Rock is the perfect place to relax on the Central Coast.