Interstate 8

Interstate 8 or I-8 is an Interstate Highway that runs from Interstate 10 near Casa Grande, Arizona to San Diego, California. The route is 348.25 miles (560.45 km) long.^[1]

Interstate 8
I-8 highlighted in red
Route information
Maintained by Caltrans and ADOT
Length	350.34 mi[1] (563.82 km)
Existed	1964–present
NHS	Entire route
Major junctions
West end	Sunset Cliffs Boulevard / Nimitz Boulevard in San Diego, CA
Major intersections	I-5 in San Diego, CA I-805 in San Diego, CA I-15 / SR 15 in San Diego, CA SR 111 in El Centro, CA US 95 in Yuma, AZ SR 85 in Gila Bend, AZ
East end	I-10 in Casa Grande, AZ
Location
Country	United States
States	California, Arizona
Counties	CA: San Diego, Imperial AZ: Yuma, Maricopa, Pinal
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future
State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic Arizona State Highway System Interstate U.S. State Unconstructed Former ← SR 7 CA SR 9 → ← SR 989 AZ I-10 →