The first European land exploration of Alta California, the Spanish Portolà expedition, camped in the vicinity of today's Cayucos on September 9, 1769. Coming from the previous campsite near Morro Bay, Franciscan missionary and expedition member Juan Crespi noted in his diary that "In the four hours that we traveled, making at the most three leagues, we encountered eight arroyos by which the water from the mountains runs to the sea, along whose edge we traveled. We halted at the eighth watering place in a moderately broad valley, into which enters an estuary fed by an arroyo of good water coming from the mountains." Crespi translator Herbert Bolton noted the camp location as Ellysley Creek (further along the coast to the northwest), but the description sounds more like Cayucos.