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.
From Everett, go north on SR529 (Broadway) over the Snohomish River; turn right onto 28th Pl NE. Follow signs to Langus Riverfront Park; continue past the park to a parking lot past the left curve in the road (under I-5). Follow the walking trail to Spencer Island.
http://www.tripleblaze.com/trail.php?c=3&i=8447