Grizzly Island Wildlife Area

With 84,000 acres of land, bays and sloughs, the Suisun Marsh is the largest contiguous estuarine marsh in the entire United States. The Grizzly Island Complex occupies about 15,300 acres of this prime wildlife habitat. The complex is a patchwork of 10 distinct land parcels, many of which are not connected and are surrounded by private land. They offer a variety of recreation opportunities and act as a vital buffer against further marsh development.
The Grizzly Island Complex combines natural tidal wetlands and artificially diked marshes. Each habitat attracts a special kind of wildlife. Pass some hours along the bay or on the graveled foot trails at Peytonia Slough. Experience the renewing rhythm of the tides, the changing complexion of marsh life. Some animals, like the California clapper rail and Suisun shrew, live exclusively in these tidal wetlands.
Fish and Gamers manage extensive waterways and pumps to create more than 8,500 acres of seasonal ponds. Plants like alkali bulrush and fat-hen are encouraged. This carefully managed combination of high nutrient food and resting ponds sustains more than 100,000 waterfowl at Grizzly Island every winter.
The remarkable mix of marsh scenery and wildlife has attracted nature lovers, hunters, anglers and others for decades. Boats and canoes drift easily on the tidal sloughs. There are 75 miles of roads and trails, and several self-guided hiking trails are being planned. Many dirt roads reveal otter crossings, but you'll also notice bicycle tracks and human footprints: there are lots of ways to experience Grizzly Island Wildlife Area.

  • Family Fun
  • Hiking and Recreation
  • Pet Friendly
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  • Phone: 707-425-3828
  • Highway 12 Grizzly Island Road
  • Suisun City, CA  94585

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Highway 12 Grizzly Island Road
Suisun City, CA 94585

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