Interstate 5

Interstate 5

Route information
Length:	1,381.29 mi (2,222.97 km)
History:	Designated in 1956 Completed in 1979
Major junctions
South end:	Fed. 1 at the Mexican border at San Ysidro, CA
	I‑15 in San Diego, CA I‑8 in San Diego, CA I‑10 / US 101 in Los Angeles, CA US 50 in Sacramento, CA I‑80 in Sacramento, CA I‑84 in Portland, OR US 101 in Olympia, WA I‑90 in Seattle, WA US 2 in Everett, WA
North end:	BC 99 at the Canada–US border at Blaine, WA
Location
States:	California, Oregon, Washington
Highway system
Interstate Highway System Main Auxiliary Suffixed Business

Interstate 5 (I-5) is the main Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the continental U.S. and U.S. Route 99 from Mexico to Canada, through the states of California, Oregon and Washington. It serves some of the largest cities on the U.S. West Coast, including Seattle, Portland, Sacramento, Los Angeles, and San Diego, and also links the capital cities of Washington (Olympia), Oregon (Salem), and California (Sacramento) together. The highway's southern terminus is the Mexican border and its northern terminus is the Canada–US border; it is currently the only continuous Interstate highway to touch the U.S. borders with both Canada and Mexico. Upon crossing the Mexican border at its southern terminus, Interstate 5 continues to Tijuana, Baja California as Mexico Federal Highway 1. Upon crossing the Canada–US border at its northern terminus, it continues to Vancouver as British Columbia Highway 99. It is the 12th longest highway in the U.S. following I-15 and the fifth longest north-south highway following I-15.