The Muir Woods National Monument is a coastal redwood forest located on Mount Tamalpais near the Pacific Coast in Marin County, California. It is named after naturalist John Muir. Due to its proximity to the ocean, the forest is regularly shrouded in a coastal marine layer fog that encourages vigorous plant growth. Sequoioideae are popularly known as redwoods, and are a subfamily of coniferous trees. It includes the largest and tallest trees in the world.