- Length
- 1,381.29 mi (2,222.97 km)
- Existed
- August 14, 1957 –present
- History
- Completed in 1979
- Nhs
- Entire route
- South end
- Fed. 1 / Fed. 1D at the Mexican border in San Diego, CA
- Major intersections
- I-8 in San Diego, CA I-10 / US 101 in Los Angeles, CA US 50 in Sacramento, CA I-80 in Sacramento, CA US 20 in Albany, OR I-84 / US 30 in Portland, OR US 101 in Tumwater, WA I-90 in Seattle, WA US 2 in Everett, WA
- North end
- Highway 99 at the Canadian border in Blaine, WA
- Country
- United States
- States
- California , Oregon , Washington