Portland International Raceway
Portland, Oregon, United States
Portland International Raceway is a flat, clockwise road course in Portland, Oregon, built on the former streets of Vanport, with racing dating to 1961 and paving completed in the 1970s. On two wheels, it hosted the AMA Superbike Championship in 1983-1984 and continues to host club racing with the Oregon Motorcycle Road Racing Association. The modern Grand Prix layout has 12 turns, including the Shelton Chicane at the end of the front straight, over 3.166 km; a nine-turn configuration without the chicane is also used. It is an FIA Grade Two circuit.
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