 This valley is also well-watered all year round and is protected from extremes of temperature and high winds.Up to the middle of the 19th century, the bulk of the redwood forest lay in the Redwood Creek valley, with extensions to the surrounding ridges.In 1826 British navy captain Frederick William Beechey used the "Navigation Trees", two particularly tall redwood trees along the ridges, to help them navigate in San Francisco Bay.