Cerro Cabrillo, or Cabrillo Peak, is a rocky mountain in eastern Morro Bay State Park in central California and one of the volcanic Nine Sisters, alongside landmarks such as Morro Rock and Hollister Peak. A rhyodacite volcanic plug, it was created when magma hardened beneath softer rock and later stood exposed as the surrounding material eroded away. The mountain honors Spanish explorer Juan Rodríguez Cabrillo, who sailed off the California coast in 1542. Today it is a popular hiking and climbing destination, noted for Tiki Rock on its east face and for slopes covered with chaparral and coastal sage scrub wildflowers.