Maurice Thorner Preserve

Marin County, California · County Open Space Preserve

A small (~60-acre) Marin County open space preserve nestled in the scenic San Geronimo Valley near Forest Knolls. Features the Thorner Ridge Trail, diverse ecosystems, and wildlife habitat. Popular for hiking, birdwatching, and nature photography. Dogs on leash welcome.

Top trails

Visiting

Fees — General Admission: $0.

Coordinates: 38.0178, -122.6680.

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