Muir Woods

Muir Woods National Monument is a unit of the National Park Service on the Pacific coast of southwestern Marin County, California, 12 miles (19 km) north of San Francisco and part of the Golden Gate National Recreation Area. It protects 554 acres (224 ha), of which 240 acres (97 ha) are old growth Coast Redwood (Sequoia sempervirens) forests, one of a few such stands remaining in the San Francisco Bay Area. The Muir Woods National Monument is an old-growth coastal redwood forest. Due to its proximity to the Pacific Ocean, the forest is regularly shrouded in a coastal marine layer fog, contributing to a wet environment that encourages vigorous plant growth. The fog is also vital for the growth of the redwoods as they use moisture from the fog during droughty seasons, in particular the dry summer. (Source: Wikipedia: http://en.wikipedia.org/wiki/Muir_Woods_National_Monument)