Smith and Bybee Wetlands Natural Area is a public park and nature reserve between the Columbia Slough and the Columbia River in Portland, Oregon. At about 2,000 acres, it is one of the largest urban freshwater wetlands in the United States. Metro, the regional government for the Oregon part of the Portland metropolitan area, manages the park. A covered shelter, restrooms, a paved walkway, and a canoe launch lie on the north side of the natural area.