Here’s the latest on entry fees and reservations for Muir Woods National Monument:
It’s $15 per adult (16 and older), and kids 15 and under get in free. If you’re driving, you’ll also need to book a parking reservation in advance which costs $9.50 for a standard vehicle. If you’re taking the public Muir Woods Shuttle, that’s around $3.75 per adult round trip.
Keep in mind: the entrance fee and parking/shuttle are separate charges, and you need both. Even on free entrance days, you still have to reserve parking or shuttle in advance. Some annual passes (like the America the Beautiful pass) are accepted too.