Morro Rock, the Gibraltar of the Pacific
Near Morro Bay, California
Rising about five hundred eighty feet straight out of the sea, Morro Rock is the anchor of California's Central Coast, a stone dome so singular that mariners have steered by it for centuries. It is a volcanic plug, the hardened core of an ancient volcano. Roughly twenty three million years ago, molten rock cooled and solidified in the throat of that volcano.
Over the ages, the softer surrounding slopes eroded away and washed to the sea, leaving only the tough inner core of dacite standing exposed at the water's edge. Morro Rock is the seaward end of a remarkable chain of these plugs, the string of hills that locals call the Nine Sisters, or the morros, which march inland toward San Luis Obispo. To the Chumash and the Salinan peoples who lived here for thousands of years, this was no mere landmark.
The Chumash call the rock Lisamu, and the Salinan call it Le'samo, and both regard it as a sacred place tied to the peregrine falcon. Spanish sailors under Juan Rodriguez Cabrillo very likely sighted the rock as early as fifteen forty two. Tradition holds that the Spanish named it El Morro, meaning a rounded crown or a Moorish turban, for its shape against the sky.
When the Portola land expedition camped nearby in seventeen sixty nine, the friar Juan Crespi wrote in his diary of a great rock in the form of a round mountain. For decades the rock was not just admired but mined. From roughly eighteen eighty nine until nineteen sixty nine, quarry crews blasted away enormous quantities of stone, using it to build the harbor breakwater here and to improve the port at nearby San Luis Obispo Bay.
That blasting connected the rock to the mainland with a causeway of rubble, which is why you can drive right up to its base today. In nineteen sixty eight, the state made Morro Rock a registered historical landmark, and it is now protected as a nesting sanctuary for peregrine falcons. Climbing it is forbidden to the public, though tribal members are granted access for ceremonies.
Stand at its foot, watch the surf explode against the stone, and you are looking at a mountain that predates almost everything human on this coast.
