Interstate 15

Interstate 15 Is A Major Interstate Highway In The Western United States. The Interstate Begins Near The Mexico-US Border In San Diego County And Stretches North To Alberta, Canada, Passing Through States Of California, Nevada, Utah, Idaho And Montana. Interstate 15 Serves The Cities Of San Diego, Las Vegas, St. George, Salt Lake City, Pocatello, Idaho Falls And Butte. It Also Passes Close To The Urban Areas Of Orange County, California, Los Angeles County, California, Provo, Utah, Ogden, Utah And Helena, Montana. The Stretches Of Interstate 15 In Idaho, Utah And Arizona Have Been Designated As The Veterans Memorial Highway.

In California
Route 15, Consisting Of The Contiguous Segments Of State Route 15 Joined By Interstate 15, Is A Major North-South Interstate Highway In The U.S. State Of California, Connecting San Bernardino, Riverside And San Diego Counties. Interstate 15 Consists Of The Southernmost 287.26 Miles Of The Interstate, A Major Interstate Highway That Extends North Through Nevada, Utah, Idaho And Montana To The Canada-US Border. It Is A Major Thoroughfare For Traffic Between San Diego And The Inland Empire, As Well As Between Southern California, Las Vegas, Nevada And Points Beyond

Route Information
Length: 1,433.52 Miles

Existed: 1957 - Present

In California
Defined By Streets And Highways Code 315

Maintained By Caltrans

Length: 293.64 Miles

Existed: 1957 - Present

Major Junctions
South End: Interstate 8 In San Diego, California

Interstate 10 In Ontario, California

Interstate 40 In Barstow, California

Interstate 515 In Las Vegas, Nevada

Interstate 70 Near Cove Fort, Utah

Interstate 80 In Salt Lake City, Utah

Interstate 84 From Riverdale To Tremonton, Utah

Interstate 86 In Chubbuck, Idaho

Interstate 90 Near Butte, Montana

North End: Alberta Highway 4 At Sweetgrass-Coutts Border Crossing At Sweet Grass, Montana

In California
South End: Interstate 5, 32nd Street And Norman Scott Road In San Diego

Interstate 805 In San Diego

Interstate 8 In San Diego

Interstate 215 In Murrieta

Interstate 10 In Ontario

Interstate 210 In Rancho Cucamonga

Interstate 215 In San Bernardino

U.S. Route 395 In Hesperia

California State Route 58 In Barstow

Interstate 40 In Barstow

North End: Interstate 15 At Nevada State Line