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Interstate 15 Maps and Information

Plan your USA road trip to Los Angeles with these maps of Interstate 15!

Interstate 15 Maps -- Overview of the entire I-15 route

As you'll be able to see, Interstate 15 is one of the few Interstate Highways that runs from border to border! It links the USA to Canada, our neighbor to the north, as well as to Mexico, our neighbor to the south.

Most of the length of I-15 is very quiet. You'll have little trouble with traffic along its route except for the very few big cities through which it passes (Salt Lake City, Utah and Las Vegas, Nevada, specifically.) Of course, once Interstate 15 gets into metro Los Angeles and San Diego, it clogs up plenty!

OK, so here's that link to the USA Interstate Highway System PDF map.

Maps of Interstate 15 -- I-15 map of Montana

Although I have plenty of experience driving MOST of Interstate 15, I'm afraid that the I-15 stretch through Montana is the one part of that interstate freeway that I HAVEN'T traveled. Sorry! So, I won't be able to give you any advice about that section...but, at least I can still provide you with a look at the maps. (The photo to your left was taken in Montana...just not near Interstate 15. You're viewing a "camp re-enactment" set at the Little Bighorn Battlefield (off Interstate 90), where General Custer made his famous "last stand.")

This first Montana map is an overview of the Interstate highway system through Montana; you'll see all of the interstate freeways marked in red. Click here for the Montana road map spotlighting the interstate freeways.

Viewing this Montana road map, you can clearly tell that Interstate 15 enters the United States from the province of Alberta, Canada. Then, as I-15 heads south, it travels through the major Montana cities of Great Falls, Helena and Butte.

Although most of the length of Interstate 15 is flat, a portion of I-15 going through the state of Montana heads through the mountains. You'll be able to see the part of Interstate 15 which heads through the hills on the following topographical map of Montana. (Use the link ahead to see this map of Montana's topography.

Most likely, you'll be taking your USA road trip into Los Angeles during the summer months of the year. You, therefore, won't have to worry with snow on the roads! I understand that this part of Montana is tremendously beautiful! (Alas, I've only visited the FLAT part of Montana!)

Since you might be worried about conditions along the stretch of Interstate 15 which travels through Montana, I'm going to link you to a road conditions map of Montana, which the state government updates with the latest weather news. Use the next link to see the map of current Montana road conditions.

Interstate 15 Maps -- I-15 Maps of Idaho

The following road map of Idaho shows all of the Interstate Highways of Idaho highlighted in red. Use the following link to see an Idaho road map with the Interstate freeways highlighted.

As you pass through the state of Idaho on Interstate 15, you'll come close to Yellowstone National Park...which is DEFINITELY worth making a side trip, if you've never seen it. You'll also pass through the major Idaho towns of Idaho Falls (and, yes, you can see the beautiful falls right in the midst of town), and Pocatello.

As you will be able to see from the following topography map of Idaho, you'll get a break from mountain driving as you travel through much of Idaho. After you leave Pocatello and head into Utah, you'll have just a bit more mountain driving to do, until you reach the flat driving terrain of I-15 through most of Utah.

Use the following link to see the topography map of Idaho.

Interstate 15 Maps -- I-15 map of Utah

Utah summer temperatures are warm-to-hot in the cities and cool in the mountainous areas. In the mountains, it can even be called "brisk" at night or during a rain storm. Therefore, you should pack a light jacket, even in the summertime, because there's some beautiful scenery up in Utah's mountains...and if you stop to see it, you won't want to get chilly.

The following road map of Utah, you'll see all of the Interstate highways highlighted in red. Use the following link to see the Utah road map with Interstate freeways highlighted.

As you drive southwards along Interstate 15 through Utah, you'll find yourself out of the mountains by the time you reach Tremonton, where I-84 merges into I-15. From there, you'll travel through urbanized areas from Brigham City (on the north) to Payson (on the south.) Traffic will be at its heaviest, of course, through Utah's capital, Salt Lake City.

In the following map of Utah's topography, you can see that most of the state of Utah is covered by mountains and hills. Interstate 15, however, runs down a long north-to-south valley...giving you great, smooth sailing for your USA road trip! Click on the following link to see a topography map of Utah.

Interstate 15 Maps -- I-15 maps of Nevada

Following, you may take a link to see a map of Nevada which highlights its Interstate highways in red for easy viewing. (On this map, you'll be able to note that I-15 does, in fact, cut through a tiny corner of Arizona! There are no towns nor roadside services along that stretch of I-15. It is, however, lined with beautiful rock formations.)

Click on the following link to see a Nevada map of I-15, with Interstate freeways highlighted in red.


Your trip heading south to Las Vegas, Nevada (from Utah) will be quiet and traffic-free. After leaving Las Vegas to head towards Los Angeles, however, you may run into quite a bit of traffic. Many Los Angeles residents make weekend trips to Las Vegas with astounding frequency; and they all need to be back at work in Southern California on Monday! Traffic jams can occur in the desert---literally "in the middle of nowhere"---on Sunday afternoons and evenings are Angelenos return home. And on "long weekends" (such as the Memorial Day or Labor Day holiday weekends)---it gets even worse!

The entire length of Interstate 15 through Nevada is flat. But, what the heck...here's the topography map of Nevada, anyway! So, click on the following link if you'd like to see the Nevada topography map.

The topography map of Nevada surely SHOWS that there's lots of hills in that state! But, don't worry---Interstate 15 manages to avoid them. Your views will be of brown flat valleys, dotted sparsely with brown, uninspiring plants. The brown mountains on your east and west will give you something to look at.

Interstate 15 Maps -- I-15 Maps of California

Immediately after leaving the state of Nevada, you'll be greeted again by mountains. There's quite a long, tall mountain to climb, in fact, as you enter the state of California. In the summertime, you'll see cars stalled at the side of the road with some frequency. About that, all I can say is, "It pays to heed the signs that say 'turn off your air-conditioning' as you travel through this stretch!"

The mountainous stretch doesn't last "forever"--you'll be out of it by the time you reach the little town of Baker (not shown on the map below.) At Baker, you'll see a GIANT thermometer reminding you just how hot it is! (By the way, hot temperatures last in this section of California from May through October.)

You'll travel through the "high desert" city of Barstow, where you can take a fun rest stop at one of the several outlet malls there. But, you're getting quite close to Metro LA now!

As you approach San Bernardino, you'll head down a long, long stretch of highway that drops you from the high desert's altitude down onto the coastal plain. Good automobile brakes and common sense are "musts" when driving this stretch of I-15! And, afterwards...you'll be in the Metro area!

Use the following link to find a California road map with the Interstate freeways highlighted.

Want to see a topography map of California? Then, use the following link, and you'll find a map of California's topography.

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