Grizzly Island Wildlife Area Solano County

Grizzly Island Wildlife Area

2548 Grizzly Island Road
Suisun City, California 94585
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Local Phone: (707) 425-3828

Grizzly Island Wildlife area consists of 8,600 acres  in the heart of the 84,000-acre Suisun Marsh, largest contiguous estuarine marsh in the United States. Grizzly Island provides habitat for more than 200 species of birds and is home to a variety of threatened or endangered wildlife and plants.

Hunting hunting of waterfowl, dove, pheasant, tule elk, and rabbit is allowed here, and the preserve or parts of it are closed to the general public at some times of year. Hunting-dog training is allowed seasonally, and  competitive events for pointing dogs and retrievers are often held on the grounds. Winter flooding often forces temporary closure. The preserve is generally open for hiking from February to July, and again starting at the end of December. Late winter and spring is best. You can start your hike at any of nine staging areas, but don't go without a map as most trails are unmarked and it's easy to lose your way.  If visiting with a dog, pay attention to kiosk signage and/or check in with the rangers before setting out.  

Note: A hunting license or CDFW Lands Pass is now required for recreational activities on Grizzly Island. It can be purchased online ($4.32 for a one-day pass, $23.76 for a pass good during a calendar year) or wherever hunting licenses are sold. 

A self-guided driving tour is a good way to get the lay of the land. The route begins at the Area Headquarters and continues for about 7.5 miles along Grizzly Island Road, which is unpaved and runs through the middle of the wildlife area. Some things you may need for an outing at Grizzly Island: binoculars, field guide, drinking water, sun block, insect repellent, jacket, and appropriate footwear. Please abide by all signs and area regulations.

Hours: Grizzly Island Wildlife Area Headquarters Office is open Monday-Friday, 8 a.m. to 4:30 p.m. The headquarters office has free literature and a collection of mounted birds. If you visit while the office is closed, please view our outdoor kiosks for interesting information about Grizzly Island.

Getting there: Take Interstate 80 north from San Francisco, south from Sacramento. Take Highway 12 off-ramp east toward Rio Vista. Turn onto Grizzly Island Road, at the stoplight at Sunset Shopping Center. Hill Slough Wildlife Area is on both sides of Grizzly Island Road from Highway 12 to the first one-lane bridge. The Grizzly Island Complex Headquarters is 9.5 miles further on Grizzly Island Road.

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