Interstate 15


I-15 is the 11th longest interstate at approximately 1,433 miles in length.

Like its close neighbor I-5, it stretches across the United States from north to south. It ends at the Canadian border and stops just shy of the Mexican border.

I-15's southern end is about 10 miles north of the Mexican border, where it junctures with I-5 in San Diego. Its northern terminus is in the remote and unincorporated town of Sweet Grass, Montana, on the Canadian border.

Attractions Near I-15

I-15 is a wonderful road to see beautiful open landscapes, gorgeous mountain views and vast canyons. There are also a great deal of things to see and do while traveling this highway, some of which are listed below:

  • Cathedral of St. Helena Helena, MT
  • Yellowstone Park Idaho Falls, ID
  • Museum of Fine Arts Salt Lake City, UT
  • Park City Salt Lake City, UT
  • Liberty Park & Tracy Aviary Salt Lake City, UT
  • Hoover Dam Las Vegas, NV
  • Las Vegas Boulevard (Las Vegas Strip) Las Vegas, NV
  • The Mob Museum Las Vegas, NV
  • Disneyland Anaheim, CA
  • Beaches of Southern California Del Mar, CA
  • San Diego Zoo San Diego, CA
  • La Jolla Beach and Cove La Jolla, CA


Construction of I-4 began in 1959. The majority of the interstate was completed by the mid to late 1960s. It was during this time that Mr. Walt Disney made his famous flyover over Orlando. When he spotted the construction of I-4, he selected the future location of Walt Disney World.

Another project, titled I-4 Ultimate, is an overhaul of I-4. It began in 2015 and is scheduled to be completed in late 2020 or early 2021.

States I-15 Travels Through

I-15 goes through 6 different states. It barely clips portions of Nevada and Arizona, and travels the entire states of Montana and Utah. They are listed below from north to south:

  • Montana
  • Idaho
  • Utah
  • Arizona
  • Nevada
  • California

I-15 Major Cities

I-15 travels on the western edge of the Rocky Mountain Chain and into the desert areas of the southwest. On its journey, it passes through a number of exciting places. Below are five of the largest cities it travels to.

  • Helena, Montana
  • Salt Lake City, Utah
  • Las Vegas, Nevada
  • Los Angeles, California
  • San Diego, California

Major Connections & Interchanges

  • Butte, MT I-90 W to Spokane, WA I-90 E to Bismarck, ND
  • Salt Lake City, ID I-80 W to Sacramento, CA I-80 E to Cheyenne, WY
  • Cove Fort, UT I-70 E to Denver, CO
  • Barstow, CA I-40 E to Albequerque, NM
  • San Bernadino, CA I-10 W to Los Angeles, LA I-10 E to Phoenix, AZ
  • San Diego, CA I-8 E to Tuscon, AZ I-8 W to Downtown San Diego, CA I-5 N to Los Angeles, CA I-5 S to Mexico



Miles:132 Miles

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