. U.S. Route 99 was the most significant north-south highway resting on the West Coast of the United States until 1964, running all the way from Calexico, California, on the U.S.-Mexico border towards Blaine, Washington, on the U.S.-Canada border.
. It was a route of the United States Numbered Highways that has been assigned in 1926 and it still exists until it was replaced for the most part by Interstate 5. Known also as the "Golden State Highway", "The Main Street of California" as well as "US 66 turned the opposite way" and US 99 will be a vital route in California all the way through much of the 1930s as a route for Dust Bowl immigrant ranch workers to pass through the state.
. The huge portions are now California's State Route 99, Oregon Route 99 as well as Washington's State Route 99 and this highway is connected to British Columbia Highway 99 next to the Canadian border.
