Washington (state) for the southernmost section where the border follows the Snake River. Oregon is to the south, with the Columbia River forming the western part and the 46th parallel forming the eastern part of the Oregon-Washington border. To the west of Washington lies the Pacific Ocean. Its northern border lies mostly along the 49th parallel, and then via marine boundaries through the Strait of Georgia, Haro Strait, and Strait of Juan de Fuca, with the Canadian province of British Columbia to the north. Washington is part of a region known as the Pacific Northwest, a term which always includes Washington and
Washington State Route 529 1913, the Pacific Highway was added to the state highway system and used Broadway (former SR 529) in Everett and State Avenue in Marysville to travel between Seattle and the Canada–US border. The Pacific Highway between Everett and Marysville, named the Vernon Road, was paved in 1916 and paid by a county road bond issue. The highway was later signed as in 1923, which became the Washington segment of (US 99) during the creation of the United States Numbered Highways in 1926. Since the bridges over the Snohomish River delta weren't complete at the time of planning, US 99 used