State Rock Ranch

San Geronimo, Marin County, CA 94963

Welcome to State Rock Ranch, a secluded luxury estate on 10+ acres nestled deep in the heart of the Redwoods in West Marin’s San Geronimo Valley. Spread across two expansive parcels, this property offers an extraordinary blend of off-grid capability, modern infrastructure, and rare access to one of the Bay Area’s most revered open space networks.
Key Features:
Direct Private Access to the Giacomini Preserve, connecting to Cascade Canyon,Hunt Camp Fire Road, and miles of MMWD watershed trails leading to Mount Tamalpais.

Solar-Powered Infrastructure: Over 50 rooftop solar panels, lead-acid battery storage, dual propane generators (for home and well), and PG&E 400 amp service (unused by seller).
Self-Reliant Utilities: 3 wells , Pressurized septic, high-speed Starlink satellite + Comcast cable installed.
Private Trail System: Miles of personal hiking, biking, and equestrian-ready trails, connecting directly to Marin’s open space.
Wildlife Sanctuary: Home to deer, hawks, coyotes, owls, abd even an occasional Black Bear!
Seasonal Serpentine-Lined Pond, named for the area’s abundant serpentine—California’s state rock—adding both visual character and rare native ecology.
Residence Overview:
4 Bedrooms | 5 Bathrooms
6200 sqft
Two-Level Flexible Floor Plan – Easily accommodates multigenerational living or guest quarters with privacy.
Panoramic Glass-Wrapped Main Living Area overlooking Roy’s Redwoods and the San Geronimo Valley.
High-End Theater Room with immersive sound system for at-home cinema experiences.
Luxury Garage, pre-wired for EV charging and multi-vehicle lifts.
Recent Upgrades: Black-trim vinyl windows, refinished deck, elastomeric spray foam roof, and remote-enabled security system.
Why It’s Special:
A once-in-a-lifetime opportunity for those seeking solitude, sustainability, and legacy ownership in one of the Bay Area’s last remaining untouched valleys. With elevated building pads, potential for a second residence or luxury ADU, and full access to world-class outdoor recreation, State Rock Ranch is ideal for nature lovers and visionaries alike.

Call or text for inquiries or for access to the full marketing package.
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