This is the place to go to see great blue herons and other birds. The area is under governance by King County Metro due to the sewage treatment facility. They've done a nice job of turning the post treatment ponds into a lovely stroll with native plant life restoring the water purity. The trail loops around the dam on the black river which was pulled out of the pipes when Boeing put in their headquarters and goes past the treatment ponds and back over onto Boeing property with their native plantings. See all sorts of winter ducks and unusuals.