No, a shuttle is not required to access the trails at Muir Woods.
If you have a parking reservation, you can drive directly to the park, where the trails begin just a short walk from the parking areas.
The shuttle primarily serves as a convenient transportation option from designated pickup locations, such as Larkspur Landing, especially during peak seasons when parking availability may be limited.
Whether you arrive by car, shuttle, or another mode of transportation, all trails start within the park itself, making it easy for you to begin your adventure!