Spencer Island is one of the best places in the Snohomish River Estuary to view waterfowl and shorebirds. Deer, coyote, river otter, and a host of small mammals and amphibians also inhabit the large island. The island has a dike top trail system, which provides scenic views of the wetlands, sloughs, and mountains.The island is co-owned by Snohomish County and the Washington Department of Fish and Wildlife (WDFW). Snohomish County owns the south half of the island, while WDFW owns the north half. The property line is approximately 1,400 feet north of the bridge.Call 360-568-2482 for information on seasonal use restrictions and interpretive programs.Note: Dogs are not permitted on the county-owned portion of the island.