• Visitors from all over the world come to explore the tranquility, beauty, and nature sounds of Muir Woods National Monument.

    Muir Woods

    National Monument California

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  • All Trails at Muir Woods are Open. Middle Green Gulch Trail at Muir Beach access limited.

    Middle Green Gulch trail is accessible at all times from the farm, starting at the office end of the farm. Access to Middle Green Gulch is closed from the Kaasai direction during the week. All trails open after 4:30 M -- F, and all day Saturday/Sunday. More »

  • Ranger's Tips on How to Experience Muir Woods Safely and How to Find Parking

    Parking is limited. Often visitors find shoulder parking and walk on the narrow road to the Visitor Center. Read the ranger's tips on the Best Times to Visit Muir Woods. Take the Muir Woods Shuttle weekends & holidays through October. More »

Plants

What is an old-growth forest and how is it different from other forests ?

Muir Woods is the only old-growth coastal redwood forest in the Bay Area and one of the last on the planet. It is estimated that nearly 2 million acres of forest just like Muir Woods once covered a narrow strip along the coasts of California and Oregon. Today, 97% of this has been impaired or altered and most coastal redwoods now grow on protected second and third growth forests or managed timber plantations. Thanks to William Kent's preservation efforts, Muir Woods was spared this fate and remains as a very accessible yet prime example of an old-growth forest.

The term old-growth is difficult to define. Old-growth cannot solely be determined by size or age of the trees within a forest because these qualities vary widely with species. However, there are four characteristics that slowly develop through time, and together define an old-growth forest.

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Did You Know?

Planting native plants in Muir Woods National Monument.

Between October 2006 to September 2007, volunteers put in 2,223 hours restoring the plant communities of Muir Woods and Redwood Creek. That’s an average of approximately 43 hours/ week of volunteer service! More...