sentences:  Of course, all the native flora and fauna which have existed in these mountains for centuries are allowed to remain—even to the extent of the highly irritating poison oak plants.This part of the California coastline was once a tribal area for the Awaswas (Santa Cruz) division of Ohlone Indian people.In 1769, Gaspar de Portolà camped on the banks of the San Lorenzo River and erected a wooden cross to mark the location as part of his exploration for Spain.