 In 1953, the highway through Thorp was deleted from the state highway system.The location of U.S. Route 10 (now State Route 10) north of Thorp in 1926, and the eventual opening of Interstate 90 in 1968, all played vital roles in the changing population and economic conditions that shaped the small community.In 1980, Interstate 90 from Seattle to Thorp was designated the "Mountains to Sound Greenway" to protect its outstanding scenic and cultural resources.