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Marin Islands Ecological Reserve


The 329-acre Marin Islands Ecological Reserve was designated as an ecological reserve by the Fish and Game Commission in 1993. It includes West Marin Island and tidelands adjacent to this and the nearby East Marin Island. West Marin Island supports one of the largest egret and heron colonies on the west coast. Species observed include snowy egret, black-crowned night heron, great egret, and great blue heron. The adjacent tidelands provide critical foraging and resting habitat for many species of birds including diving ducks and other water birds. Shore birds also utilize the surrounding mud flats.

For more information, call the Bay Delta Region Fairfield office at (707) 428-2002.

Recreational Opportunities

Wildlife Viewing

This ecological reserve is adjacent to or shares marine habitat with a Marine Protected Area (MPA). For the public use regulations for MPAs, see Section 632, Title 14, CCR.

Activities: wildlife viewing

PLEASE NOTE: For information on public use regulations for this area and other Department lands please refer to the link opens in new windowCDFW Public Lands Regulations booklet. Scroll to the Table of Contents. Locate the page number for general regulations for public uses on all Department lands. For additional regulations that apply only to certain properties, check the Table of Contents for sections that refer to additional or property-specific regulations for wildlife areas or ecological reserves. All visitors are responsible for knowing and following the general and property-specific regulations.

Last update : 10/31/2018 9:35:08 AM

Wildlife Branch - Lands Program
1812 9th Street, Sacramento, CA 95811
(916) 445-0411

Map of Marin Island ER
Click to enlarge


Bay Delta Region (Region 3)

Marin County

San Rafael Bay offshore from City of San Rafael yacht harbor, between San Pedro and Point San Quentin

Access: by boat

CDFW Lands Viewer