The Hillsboro Main Street Bridge is a concrete tied arch bridge located in Hillsboro, Oregon. The bridge carries light rail traffic on the MAX Blue Line over Main Street and 18th Street. Completed in 1997, the 425-foot-long (130 m) bridge was built with a 78-foot-tall (24 m) arch in the center. It is located between the 12th Avenue Station and the Fair Complex Station.