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 (810 ha), 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.
Although surrounded by port terminals, warehouses, and commercial areas, Smith and Bybee Wetlands Natural Area provides habitat for a wide variety of wildlife including beaver, Bald Eagles and Western painted turtles. An artificial water-control system helps keep the wetlands wet. Other systems collect methane and prevent leaching from a closed landfill near the south edge of the park.
The 2,000-acre (810 ha) park includes restrooms, interpretive displays, a covered shelter, parking for 40 cars, a bus drop-off, and public art, all near North Marine Drive, which skirts the north edge of the wetland. The parking lot is about 2.5 miles (4.0 km) west of the Delta Park–Marine Drive West exit from Interstate 5. A paved, wheelchair-accessible path called the Interlakes Trail leads from the parking lot to two wildlife viewing platforms between the lakes. Boaters in non-motorized craft can use the park's canoe-launch to enter the lakes for recreation, wildlife viewing, or fishing for non-native species. Bicyclists and walkers can reach the park via a bicycle path, which runs along North Marine Drive and is part of the Portland metropolitan area's system of greenway trails known as the 40 Mile Loop.