Muir Woods is a short drive (12 miles) north from San Francisco and is a part of the Golden Gate National Recreation Area. This National Monument is known for its forests filled with coastal redwood trees, some of the biggest trees in the world. The area is often blanketed in fog which adds a mysterious atmosphere to any visit, and also helps the redwoods survive in the drier summer months. In May 1945, Muir Woods was host to a very special international event. United Nations delegates meeting in San Francisco traveled to Muir Woods to honor the late President Franklin D. Roosevelt with a special memorial in a grove of redwood trees. Please visit the United Nations Memorial Service for President Roosevelt at Muir Woods page for more information. Muir Woods has a rich and varied history, from its use by the Coast Miwok people, to its early days of tourism and the Mount Tamalpais Mill Valley Scenic Railway, to an era of conservation, to modern preservation. In each era, the forest has been affected by the actions of humans, for better or for worse.