Marsh Creek State Historic Park

Update (June 8, 2021): Whether an experienced outdoor enthusiast or a new one, park visitors must continue to recreate responsibly in the outdoors as the pandemic is far from over.

COVID-19 Guidelines

Recreate Responsibly
Protect yourself, family, friends and your community from COVID-19 by following these prevention measures while recreating in California’s State Park System:

  • Know Before You Go – Prior to leaving home, check the status of the park unit you want to visit to find out what restrictions and guidelines are in place. Have a back-up plan in case your destination is crowded. Stay home if you are sick.
  • Plan Ahead – Some restrooms will be temporarily closed to keep up with cleaning schedules. Bring soap/hand sanitizer.
  • Play It Safe – Find out what precautions you should take when exploring the outdoors, especially if this is your first time visiting the State Park System. Learn more at parks.ca.gov/SafetyTips.
  • Keep Your Distance – Avoid crowds. If there are too many people at a park or beach, please visit on a different day.
  • Wear a Mask – State Parks continues to follow guidance provided by the California Department of Public Health:
    • Everyone: In indoor settings, such as museums and visitor centers, face coverings are required regardless of vaccination status.
    • Fully Vaccinated Persons: Face coverings are not required outdoors except when attending crowded outdoor events.
    • Unvaccinated Persons: Face coverings are required outdoors any time physical distancing cannot be maintained.
  • Leave No Trace – Leave areas better than how you found them by staying on designated trails and packing out all trash. Do not disturb wildlife or plants.

Although law enforcement entities have the authority to issue citations, the expectation is that the public is responsible for adhering to the advice of public health officials, visitor guidelines and closures.

Phone Number

(925) 673-2891

Park Hours

None listed

Dogs Allowed?

No
Not open to the public.

Driving Directions to Marsh Creek State Park

We are in the process of creating directions for this park.

Online reservations are not available for this park.

No online brochures available for this park.

Upcoming Park Events

No events scheduled at this moment.

DAY-USE ACTIVITIES & FACILITIES
Historical/Cultural Site

Project/Site Description
Cowell Ranch/John Marsh encompasses 3,659 acres of natural habitat, wildlife, and unique cultural features, including the historic John Marsh Home.  John Marsh lived on the property from 1837 to 1856. He was the first American Citizen to settle in what today is Contra Costa County.  He was a medical doctor and developed Rancho Los Meganos as a large cattle ranch.  The John Marsh Home when completed in 1856 was considered the "finest ranch home in California".  Through the efforts of concerned citizens as well as the Trust for Public Land and other entities, Cowell Ranch/John Marsh is one of California's newest state parks, although currently not open to the public. 

Partners in Park Planning
In a collaborative partnership, California State Parks and the City of Brentwood Parks and Recreation Department are participating in a joint planning process to plan the future development of Cowell Ranch/John Marsh.  Working together with the community, this planning process will create a vision for the future; provide recommendations for the future of the historic John Marsh House, public recreation access, and natural resource management as well as guidelines for implementation of a long term vision for the Park so it can be enjoyed for years to come.

For planning information, click the General Planning Information Related link.