Marconi Conference Center State Historic Park
- Status
- Open (per official listing)Daily sunrise – sunset
- Entrance fee
- Statewide rule — see below
- Day-use reservations
- None mentioned
- Dogs
- Statewide rule — see below
- Camping
- Yes
- Official site
- parks.ca.gov(415) 663-9020
Official page last checked Oct 29, 2026. How we keep this current
Overview
In Marin County, about 15 miles southwest of Petaluma, Marconi Conference Center State Historic Park covers about 57 acres.
Things to do include historic sites, boating, wildlife watching, and hiking. Water access includes a boat ramp.
Hours
Park, gate, office and facility hours are listed separately because they often differ. Alerts above override normal hours.
| Facility | Days | Hours | Season |
|---|---|---|---|
| Park | Daily | sunrise – sunset | — |
Official wording
Open to the General Public Sunrise to Sunset
Source: official park page, checked Oct 29, 2026. Times are local to the park (America/Los Angeles).
Fees and passes
Per vehicle at most parks (vehicles of 9 people or less, walk/bike-in free); per person at State Historic Parks and museums; amounts vary by park and are listed on each park page.
Statewide fee rule from California's park system; this park’s page doesn’t list its own fees.
California park passes
- California Explorer Annual Pass — $195. Vehicle day-use entry to 134 state parks incl. high-demand Southern California beaches Details
- Golden Poppy Annual Pass — $125. Vehicle day-use entry to 112 state parks Details
- Historian Passport — $50. Admission for up to four people at per-person-fee State Historic Parks Details
- Off-Highway Vehicle (OHV) Annual Pass — $50. Entry to State Vehicular Recreation Areas that collect day-use fees Details
- SNO-Park Pass — $40 season / $15 day. 18 SNO-PARK winter recreation areas Details
From the California state guide. Confirm which passes this park accepts.
Reservations
- Day use
- No day-use reservation requirement mentioned
- Booking system
- ReserveCalifornia
- Phone
- (800) 444-7275
We link to the official booking system rather than showing live availability, which changes minute to minute.
Pets
See the park’s wording
Are dogs allowed? Yes: Please contact Maroni Conference Center at (415) 663-9020 or visit their website at Marconi State Park - Marconi Conference Center for information regarding their dog policy.
Service animals are generally permitted where pets are not. Check with the park for specific areas.
Camping
Overnight facilities: Lodging
From the official park page, checked Oct 29, 2026. Site counts and prices can change; confirm when booking.
Cabins and lodging
- Lodging
Lodging
Things to do
BoatingHistoric sites and toursWildlife viewing and birdingHiking
Amenities
Facilities
- Drinking water
- Visitor center
- Nature center or museum
- Restaurant or food service
- Parking
Water
- Boat ramp
✓ listed by the park · ✕ the park says it is not available. Anything not shown here isn’t mentioned by the official source — that means unknown, not unavailable.
Accessibility
Overview
The Marconi Conference Center is situated on 62 acres of wooded hills overlooking scenic Tomales Bay in Marin County. Eventually, turn-of the century historic structures from the era of radio pioneer Guglielmo Marconi will be restored, but the site is now used only by group reservation. The conference center is on Highway 1, two miles south of Marshall. Phone (415) 663-9020 for more information and to make a reservation.
Other Information
The hillside setting of this historic conference center may challenge wheelchair users. Buck Hall, Pine Hall and Cypress Hall conference rooms have generally accessible features, including the restrooms and parking spaces. The Redwood dining hall is generally accessible and has one accessible parking space. One guest room, #102 in the Heron building, is designated accessible. Visit Access Northern California for detailed lodging accessibility information and photos.
Official accessibility information
Conditions change. Contact the park to confirm specific accessible features before your visit.
Getting there
- Address
- 18500 Highway 1
Marshall, CA 94940 - Nearest town
- Petaluma — about 15 mi southwest (straight line)
- Coordinates
- 38.1436, -122.8766
- Phone
- (415) 663-9020
Entrances
- Directions point
Google Maps directionsApple MapsOfficial park map (PDF)
Directions from the park
On Highway 1, two miles south of Marshall, CA.
Nearby state parks
Sources and freshness
- California State Parks — park page — last checked Oct 29, 2026
- California State Parks Listing page (one link per unit, page_id = officialId), unioned with the CSP Enterprise GIS 'ParkEntryPoints' ArcGIS layer (coords, address, county, unit number, management status) and the 'CSPParkUnit_CurrentStatus' layer (open/partial/full closure)
- Wikidata
- USGS PAD-US 4.1 (boundary and acreage)
“Last checked” is when our system last read the official source. No change has been detected since this page was first published. Hours, fees and rules can change without notice — confirm with the park before you go. Methodology